The ELEPHANT SUDOKU book is fun and peeks one's curiosity due to its volume. It is a great gift for loved ones, but especially a must have for any sudoku fan. The book contains 4950 puzzles over 828 pages, fitted in an appropriate size, and has been well-designed with a reader friendly font. Solutions were provided at the end of each page. Numbers are placed symmetrically for three levels of challenge and a unique solution has been checked by a computer.