Mensa's Most Difficult Logic Problems. Test your powers of reasoning with exacting enigmas

Mensa's Most Difficult Logic Problems provides an exceptional analytical challenge for even the most adept of puzzlers.
Sound reasoning and logical thinking are foundations of all types of puzzle solving, and you will need to be first-rate at both to work these conundrums out successfully. With classic logic puzzles like Sudoku and Train Tracks to tricky modern puzzles like Linesweeper and Spiral Galaxies, this colourfully fien