From the description:
Bargains! Complications! Consequences!
The Devil's Almanac is a collection of Devil’s Bargains to be used in the Blades in the Dark role-playing game. It provides multiple suggestions to fuel the imagination of game masters and players alike. You’ll find Devil’s Bargains for different crews, characters, districts in Doskvol, and more. Each of these are organized into tables that can be rolled randomly, or chosen for a perfect bargain.
If a player is playing a Lurk in Brightstone and asks for a Devil’s Bargain, take a look at the tables for Lurk, Brightstone, or their specific crew. Roll a d6 to pick one at random, or pick one that feels like it is particularity apt for the moment.
These bargains can also be used as complications or other consequences for your Blades in the Dark game.