What measures just 4-1/4'' wide x 5-3/4'' high and provides hours of entertainment, yet makes time stand still? The Little Black Book of Brain Games! Packed with dozens of puzzles and problems to entertain your brain, this pocket-sized book will challenge your skills with words, math, and logic. Portable size makes it perfect for travel. Concealed wire-o binding lies flat for ease of use. Durable hardback cover material. Elastic band keeps your place or keeps book closed. Little Black Book measures 4-1/4'' wide x 5-3/4'' high. 208 pages.