Bend Your Brain: 151 Puzzles, Tips, and Tricks to Blow (and Grow) Your Mind

Since Marbles started helping people play their way to a healthier brain, they've sold, solved, and been stumped by more than their fair share of puzzles. Along the way, they've learned which puzzles people love, which ones to avoid, and which ones make the neurons downright giddy. Bringing all of that knowledge to bear, as well as their access to the latest developments in neuroscience, the Marbles brain trust has designed this series of logic puzzles and brain teasers (including acrostics and number puzzles) to keep your mind flexible and fit.