Crack the Safe: Complete
Logically deduce the combination for each lock and CRACK THE SAFE! These 91 unique puzzles are a delightful exercise in pure logic. Starting at an easy, introductory level, they progress to a challenging conclusion. The series consists of 91 puzzles from 3 books. Full tutorials are included for each puzzle.
Full description below.
These three books consists of 91 puzzles, as well as detailed solution tutorials. Each puzzle involves finding the correct combination for a combination lock, given certain clues regarding the "closeness" of some incorrect guesses.
You can purchase the levels separately here.