What measures 4-1/4'' x 5-3/4'' and provides hours of entertainment, yet makes time stand still? The Little Black Book of Brain Games, of course! Packed with puzzles, posers, and problems that will entertain your brain while fostering mental acuity, this portable book will challenge your skills with words, math, and logic. Are you game? It's the perfect little gift book for your favorite puzzle fan. 208 pages. Book lies flat for ease of use. Elastic band place holder.