Steam app 1028310 · updated 12 Sep 2026, 18:33 UTC
Restore a crumbling occult library by a winter sea. Build the world’s foremost collection of grimoires and arcana. Master the invisible arts. BOOK OF HOURS is a narrative crafting RPG set in a 1930s world of hidden gods and secret histories. What sort of Librarian will you choose to be?
718 hourly samples, with the daily peak drawn over them. Weekends are shaded.
38 months, August 2023 to September 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.
The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.
31 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.
31 days as the curve, each the highest figure that day. Behind it, 438 hourly samples from 13 Aug, which is as far back as the source keeps every hour. Weekends are shaded.
12 days as the curve, each the highest figure that day. Behind it, 280 hourly samples. Each dip is a night. Weekends are shaded.
BOOK OF HOURS was released on 17 Aug, 2023.
| Language | Full audio |
|---|---|
| English | |
| Russian | |
| Simplified Chinese | |
| Japanese |
A blank audio cell means full audio was not marked in the returned language list.
95 achievements in total.
50 developer announcements, Jan 2024 to Jul 2026 · times in UTC
Happy Thursday, everyone! BOOK OF HOURS and all DLC have all just been set to 60% off, their lowest discount ever. So if you've been meaning to host a salon for your occult friends, now's a good time to try HOUSE OF LIGHT. If you'd like…
Arabella DuskHey Librarians! I'm just posting a quick cross-post of some new isometric Hush House art from our upcoming game, Travelling At Night. I thought you'd enjoy it, so here it is in all its glory!Travelling is set in the same Secret Histories…
Arabella DuskFull modding support is now live. Many thanks to our curator-freelancer Chelnoque for making this happen. The Workshop is live here:https://steamcommunity.com/app/1028310/workshop/ DLL mods - that is mods which alter the base compiled code…
AKModding beta->live
Patch notesWelcome to 2026, everyone, The sum of the digits in this year is 10. The sum of digits in 10 is 1. There's probably something in that.New update (on the beta branch) for the new year. There's one big feature that I've already given away in…
AK"Reverend Timothy, having secured the attention of an attractive woman prepared to listen to his sermons, is now elucidating his previous *and* his next intended Christmas sermon. Coquille fastens her smile more charmingly on her face. Her…
Arabella Dusk“Language is the key. It was language that opened the doors of the Mansus; without language, we could have had no peace; without language, we would still be beasts, worms, mud.”At long last, we’re delighted to launch full Japanese…
Arabella Dusk\ 2025.8.e.3: "EAGLES" A number of tiny ameliorations from the redoubtable ChelnoquePerfected skills stop displaying upgrade slotsFilms and phonograph records can no longer be contaminatedThe cursor is anchored more thoroughly when trying…
AK- ACCESSIBILITY: Edge scroll (moves the camera when the cursor is near the edge of the screen) - off by default, can be toggled in the settings - Custom window size persists after closing the game - Certain impossible save names are now…
Patch notesThis is a new blog post from AK, almost entirely about Cultist Simulator (whose SEVENTH BIRTHDAY it is tomorrow). But there's a lot that's directly relevant to the design of BOOK OF HOURS, so I thought you BoH players might find it…
Arabella Dusk"Language is the key. It was language that opened the doors of the Mansus; without language, we could have had no peace; without language, we would still be beasts, worms, mud." We’ve missed you, Hush House! Today we’re launching a Japanese…
Arabella DuskJapanese language beta!
Patch notesIt's now possible to create community localisations for BOOK OF HOURS! Details here: https://weatherfactory.biz/book-of-hours-locmod-creation-reference/
Patch notesFirst things first: Cultist Simulator is 50-70% off as part of the Lovecraftian Days sale, so if you haven't played BOOK OF HOURS' elder brother, now's a great time to try it. (Cultist Simulator is a crueller game, but if you like BoH, you…
Arabella DuskSome people were seeing a crash on Mac. After this they shouldn't!
Patch notesthat is, we're now Verified on Steam Deck. Thanks to Chelnoque for doggedly chiselling away at this exacting task. Valve's QA process has evidently tightened up: we've been back and forth addressing niggles with their verification arbiter…
AKMerry Christmas, everyone! We're rounding off the year with a live AMA on the Weather Factory subreddit, starting in about half an hour. Come talk to us about anything BOOK OF HOURS, Secret Histories, why you should never leave the…
Arabella DuskMajor news! We're announcing our next game, set in - and probably our last in - the Secret Histories universe. Meet Travelling At Night, a dialogue-driven choices-matter combat-free CRPG in the tradition of isometric greats like Disco…
Arabella Dusk"Reverend Timothy, having secured the attention of an attractive woman prepared to listen to his sermons, is now elucidating his previous *and* his next intended Christmas sermon. Coquille fastens her smile more charmingly on her face. Her…
Arabella DuskFrom beta to live! * Chel's performance improvements are in this patch * Bug fixes for things the perf improvements did that needed fixing * Russian localisation * The usual straggler round-up of typos and tweaks
Patch notesThe later stages of BOOK OF HOURS get a little stuttery, and I get a mail every couple of weeks from someone who’s dismayed that their high end rig built around a 4090 RTX isn’t running BH with the buttery smoothness that it can manage for…
Arabella Dusk"Chitinous cities embrace the Change, or struggle against plagues of leaf and amber..." AK here. It still tickles me how few people realise Weather Factory is literally just two people (plus, ofc, trusted freelancers). I answer support…
Arabella DuskAn update for all our Chinese players: HOUSE OF LIGHT is now fully playable in Simplified Chinese! This means all 270,000 words of BOOK OF HOURS + HOUSE OF LIGHT are translated in beautiful Simplified Chinese, and you can play the whole…
Arabella Dusk- The Wonderful Shape is now a Dawn book - Rest at Sweet Bones: Winter message now only displays in Winter - Tooltip on first-day ticker no longer flickers - Tuned some of the sounds in the Wisdom Tree - If you've completed a standard…
Patch notesThanks to the hard work of the Chinese localisation team, there's a preview version of the Chinese localisation of HOUSE OF LIGHT available now. There may be missing texts or oddities - please let us know about these at…
Arabella DuskThe headline feature here is a patch to address the problem some people saw with blank Further Stories events in legacy saves. There are also a bunch of typos and story logic oddity fixes, and a tiny additional feature that will become…
Patch notes"Mrs Kille respectfully addresses Morgen as 'Chaculette'- a title that Morgen seems to recognise - and bows her head. Morgen touches a finger to her lips, and then to Mrs Kille's forehead - perhaps a blessing, perhaps something else." It's…
Arabella Dusk"Before gods arose from blood, before ever ape stood upright, this was the language heard in the House of the Sun...” All 200,000 words of BOOK OF HOURS are now available in Simplified Chinese and Russian! (Japanese language is coming a…
Arabella Dusk"Facts are like cows. If you stare them in the face hard enough, they generally run away." — Mervyn Bunter, Clouds of Witness (1926) Facts are the bricks of life, but they need a few licks of paint before you want to look at them. Mr…
Arabella Dusk* A fix specifically for the logo not changing when you switched specifically from Chinese to Russian in the menu. * Another fix for the bug the logo fix caused, where all buildings in Brancrug looked like the Sweet Bones.
Patch notes(and finally the bookshelf labelling system supports Chinese characters)
Patch notesladies germs and others, hello! Most of this patch is prep work for HOUSE OF LIGHT (out next month) and for Russian and Chinese localisation (out next week, available now if you add loctest=1 to your config.ini). But some of it will…
AKONE YEAR AGO TODAY… On August 17th 2023, just before six o’clock in the evening, nervous glasses of wine in our trembling hands, cats winding demandingly round our trembling ankles, Lottie and I clicked the big green LAUNCH button for BOOK…
Arabella Duskhttps://store.steampowered.com/app/2834350/BOOK_OF_HOURS_HOUSE_OF_LIGHT/ AK is away currently on a mysterious writing trip - his last before HOUSE OF LIGHT launches - to finish up the Lighthouse Institute. You've probably noticed that our…
Arabella Dusk"Lucia the Eyeless will parley with the Chandler. Perhaps she'll alter her loyalties; perhaps the Chandler will free poor Ghirbi..." For no particular reason, I've been reading about the punk and post-punk scene in Leeds in the late 70s.…
Arabella DuskAK posted this to the subreddit last night: {STEAM_CLAN_IMAGE}/35142931/41206b6cab9f3ae021e7188820a0b6a7b6ce6dc2.png "Celebrating the completion of the Further Visitor Stories in HOUSE OF LIGHT. That means we're at 80% done, which means in…
Arabella Dusk“In the Mansus, the Hours strive one against another. As the struggles are resolved, they iron out the impossible, exalt the possible, tie the fraying braids of what has been into one golden ribbon of future. Everything is resolved. History…
Arabella Dusk- You can now sometimes find blackberries, rosehips and mushrooms on the Moor - ESC now closes the detail window (for consistency: it already closed terrain and verb windows) - You can order a greater variety of things from T.R.N and C&H…
Patch notes"Al-Adim and Agdistis are gossipping, quietly, about al-Adim's patroness. 'Not a hundred legs,' says al-Adim, 'but more than you'd think…'" If a videogame is a wall, what do you think - is writing more like the bricks, or more like the…
Arabella DuskAaand we’re back! The previous article had us rambling about the structure of Alexis Kennedy’s prose, something that makes translating it akin to translating poetry. Today I am going to talk some more about linguistic treasures hidden in…
Arabella Dusk(Everyone of a certain age understands the importance of knowing where one's towel is)
Patch notesSpoilers ahead. Skip to the food pictures if you don't want spoilers... HOUSE OF LIGHT is a good-sized expansion with an unusual congeries of different features, which I've been assiduously altering from a congeries into a constellation…
Arabella Dusk- Fix for on occasional crash on the menu screen - Fix for a bug where unlocking the village but not the bridge, and then reloading, would LOCK THE BRIDGE FOREVER
Patch notesYou know you're in the right place when the top-rated post on your subreddit is: {STEAM_CLAN_IMAGE}/35142931/e01a9803aa9c4b631bafb1f09911bfcbb5e0e724.png The real hot topic from this week, though, is what comes after vegetables. I'll let AK…
Arabella DuskI've pushed a small update (2024.e.3.14) to the EHSAN patch on beta., repeat ON BETA, this won't show up in the main channel until the 5% of players who live in the beta channel have kicked the tyres. There is one E A R T H S H A K I N G…
Patch notesDisclaimer: Weather Factory is a two-person husband-and-wife team. In the following guest post, the two localisers translating BOOK OF HOURS into Russian are incredibly kind about AK's writing. Because we are Extremely English we're both…
Patch notes"To mix the rarest colours, a merciless detachment is required." Firstly, EHSAN (2024.2.e.11) is now live for everyone on the BOOK OF HOURS main branch. The changes are…
Arabella Dusk- All bookshelf plaques are now invisible until they have text There were just a handful of plaques that were invisible even when blank - 'De Bellis Murorum' is now considered a Curia period not Dawn period book There are a few others that…
AKI've been working on some new revolutionary (!) UI for our upcoming BOOK OF HOURS expansion, but I can't show you it yet because it's not final functionality, and we don't want people misconstruing an early mock-up of an eight-slot…
Arabella Dusk"January 9th, 1838. A heavy snow falls on Brancrug. When the staff dig themselves out, Solomon Husher, third Librarian of the House, has disappeared from his quarters in the Long Tower, leaving a letter of resignation. 'Winter,' the letter…
Arabella DuskEverything Steam lists as add-on content for this game, newest first. Prices are left out on purpose: the store answers this page in one currency and it is not the reader's.
| Name | Platforms | Released |
|---|---|---|
| BOOK OF HOURS: HOUSE OF LIGHT | WindowsmacOSLinux | 26 Sep 2024 |
| BOOK OF HOURS: Original Soundtrack | WindowsmacOSLinux | 15 Dec 2023 |
What Steam runs, and with what. Straight from the app configuration.
| Description | Executable | Arguments | Platform | |
|---|---|---|---|---|
| Launch | bh.exe | windows | ||
| Launch | OSX.app | macos | ||
| Launch | bh.x86_64 | linux |
The folders Steam Cloud syncs. The root is a token Steam uses for a location on your own machine, not a path this page can know.
| Root | Folder | Files |
|---|---|---|
WinAppDataLocalLow | Weather Factory/Book of Hours | AUTOSAVE.json |
WinAppDataLocalLow | Weather Factory/Book of Hours | config.ini |
WinAppDataLocalLow | Weather Factory/Book of Hours | *.json |
WinAppDataLocalLow | Weather Factory/Book of Hours | etern.ity |
It runs on public data and somebody's spare time.
https://paypal.me/KintaroPalPay[email protected]0x4d559C765AA8BFe336E36d5b76024926767eD38dTJtctWU9uetJaTBoSybd1RErW7n9duTKVG