(n) Expensive and big software tutorial books that based their thickness on boring and non-intuitive presentation of contents. Such as your typical Whatever-For-The-Web kind of books. Tutorial books that remind you of bio or chemistry text. Example: That Flash thickbook is so crappy I couldn't learn anything from it. I fell a sleep everytime I read it.
THICKBOOK
Meaning of THICKBOOK in English
Slang English vocab. Английский сленговый словарь. 2012