Comment by Sharlin

The sort of ~100 page softcover reference book that we were permitted to use in highschool math, physics, and chemistry exams is called around here, literally translated, a book of tables. The term is probably a remnant from a time before pocket calculators when it contained actual trig and log tables. "Book of formulas" would probably be a more apt name nowadays. Not sure if there's a common word for such a thing in English.