Wiktionary
sourcebook
n. 1 A book consisting of a collection of writings on a particular subject. 2 A publication intended to supplement the core materials of a roleplaying game.
Wikipedia
Sourcebook
The term sourcebook (or source book) is used to describe many different kinds of books such as collections of core articles (i.e., anthology), bibliographies, biographies, printed archival sources, directories and so on. There seems to be no consensus in the application of this term.
Usage examples of "sourcebook".
There are at least ten excellent sourcebooks on how to make your own garotte, and those are just the editions that are still in print!