Everything about book bartering sounds great, but with that move, does it allow for a re-roll after a miss? Or if you fail, it means you just don't have any way to apply the knowledge it contains correctly?
PC: "I'm gonna read me this 'Advanced Brain Surgery' that Dremmer gave me for payment. *rolls* Damn."
MC: "Eventually, you realize there's not a damn thing you can use in here without a fully functional Old World hospital, years of study of the nervous system, and a Brain Wave Tricorder. Tough cookies."
-or-
MC: "It was a bust for you... but Bogs restarted your brain once, yeah? Maybe she can (help you study/roll to read it herself)?"