Have you ever gotten into a hole on Wikipedia, where you spend hours upon hours digging into increasingly bizarre and unfathomable facts that you hazily half remember later? Then, at some work lunch, you tell your coworker something like "oh, yeah, actor Michael J. Fox won a nobel prize for his work on elastic belts" only to realize you've combined a lot of complete nonsense in your head to make up a fake fact that doesn't mean anything? ... no, just me? Well, crap. Anyway, September's IOTM is the Book of Facts, and it comes with some similarly dubiously crafted facts about every monster in the kingdom... and MUCH more.
The Book of Facts is hard to summarize. In a nutshell, it gives you a skill. That skill lets you see a special fact about every monster in the kingdom. But TPTB didn't manually create these facts -- these facts were built via procedural generation, which means they change locations (essentially) every class/path combination you can think of. (Hence the "the facts are fake" part of the intro.) But never fear -- Semenar, the professor of the Ascension Speed Society, put in some major work and managed to completely derive the formula used to procedurally generate these facts. You can find our hosted tool to dig into every seed here! It's great, don't miss out! (And if you want to see the brain-melting data collection exercise that helped our professor solve BOFA, check out this spreadsheet!)
But, Scotch, what are the actual facts? What the actual hell do these even give you?
Boy, am I glad you asked, disembodied voice of the loathers.net reader! These facts allow you to get:
In addition to these postcombat drops/buffs -- where, again, something is placed on every monster in the entire dang game -- we also are granted two skills. One skill (Recall Rhythms) can be used to get +11 rollover adventures per day. The much more important skill, Recall Habitats, gives you 3 shots a day of a skill that's effectively "Extrovermectin, but better" -- it produces 5 copies of the monster you use them on that will appear in any wander-able zone you adventure in.
That rules! That's so good! What the hell!
I mean, holy crap, this thing does everything.
Going from best to worst:
That makes this an IOTM that is similar in value to the Cold Medicine Cabinet -- it saves a floor of about 21 turns a day that can bulk up to 29+ in some situations. Absolutely bonkers turnsave value in an IOTM.
We'd rate the Book of Facts as a tier 0 IOTM, with (way more!) than 15 turns saved daily in your average run. If you care about speedrunning, this isn't an IOTM you'll want to miss.