A chatty, cogent, fun book about the biochemical building blocks of memory. It warehouses current memory science and includes discussions of common memory experiences (tip-of-the-tongue forgetting, visual-spatial recognition, the relationship between maps and streets), the history of memory science, and technical details about how the brain stores memories. The author uses everyday situations and clever metaphors to illustrate science with everyday experience. If you already know how calcium ion levels in neurons affect NMDA channels and influence Long-Term Potentiation, then this book is not for you; but the discussions of these biochemical basics are quite lucid and provide non-experts with clear explanations about how the brain learns and remembers--and forgets!