Absolutely superb. I think Rich Howard did an incredible job of creating an entirely new item class--'Mundane' books--and really following through with how these texts and tomes would be used in a Roleplaying world: a beautiful concept the feels like it should have been in the rules all along. While the alternate rules for crafting new books adds a layer of complexity, it does so in such a way as to turn books into prized possessions; each with a potential story behind it instead of the 'You can now make all this' spreadsheet you get from alchemical crafting.

Well written, well designed, and a great plugin to add flavor and functionality to your game. Fits perfectly for the 'knowledge is power' scholar type character as well as the brutish fighter with no knowledge ranks who still knows enough to go to the library and research this new and dangerous enemy.