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 collection challenges your skills with words, math, and logic. Are you game? 208 pages.Book lies flat for ease of use. Elastic band place holder.