"The Sharper Mind: Mental Games for a Keen Mind and a Fool Proof Memory" by Fred B. Chernow
This book is great. For remembering numbers, conquering absentmindedness, recalling numbers, mental math, and mental workouts, etc.... This book has much to offer for mind improvement. This book covers a wide range of abilities for mind betterment. I would recommend this book because of the different methods offered in which other books might not comment. This book is not extremely detailed and elaborate but I believe it goes well in accompanying other memory books. The memory populate should read.
Language Classification by Numbers This book considers how languages have traditionally been divided into families, and asks how they should classified in the future. It describes and applies computer programs from biology and evolutionary genetics to data about languages and shows how the power of the computer can be harnessed to throw light on long-standing problems in historical linguistics.
Cambridge University Press - Numbers, Groups and CodesPaperback: 354 pages
This thoroughly revised and updated version of the popular textbook on abstract algebra introduces students to easily understood problems and concepts. John Humphreys and Mike Prest include many examples and exercises throughout the book to make it more appealing to students and instructors. The second edition features new sections on mathematical reasoning and polynomials. In addition, three chapters have been completely rewritten and all others have been updated.