The World's 200 Hardest Brain Teasers: Mind-Boggling Puzzles, Problems, and Curious Questions to Sharpen Your Brain by Dr. Gary Gruber utilizes the "Gruber Method" to enhance critical thinking through varied logic, math, and lateral thinking puzzles. Published in 2010, the collection focuses on process-oriented problem solving applicable to standardized tests. Explore the book's details on Amazon.com .
