Puzzle books are an example of learning that doesn't 'feel' like learning.A great collection of Hard and Challenging Puzzles. Build Math Thinkers for STEM mindset with this puzzle book. Get off your computer and phone and give printed puzzles a chance We all need to spend less time on-screen. Solving puzzles can help keep that brain moving in the right direction Perfect for long car rides, rainy days and restaurants This exciting book...