Twice a year, the powers that be in the Navy come out with a Bibliography of the material you need to study for the bi annual advancement test to get promoted to the next rank up the ladder. Each bib is specific towards the rate rank of test you are taking and tells you exactly what information you need to study, chapters, instructions, workbooks, manuals, etc.
The exam I'm currently studying for is the HM1, E-6 exam. After finishing up my FMF warfare device and my brain was still in the study mode so I picked a manual out at random and started reading. Over the past couple of weeks I've literally read 1500 or so pages and my brain was starting to ache and my eyes get blurry trying to memorize this supremely dry material.