IMPORTANT - EBOOK edition of this book is an PRINT BOOK REPLICA and not used for completing puzzles on the device. The eBook is a preview providing useful content on the benefits of crossword, sudoku and other puzzles for both children and adults, also showing the actual puzzles available in the physical copy of the book. A BONUS link in the book lets you download books with high quality crossword puzzle and sudoku book PDF pages with dozens of puzzles with clues and answers that readers can PRINT. The download is optional, it is not the main function or purpose of this ebook - PRINT REPLICA. Your brain is abuzz with information when you're doing crossword puzzles. You have to delve deep into your mind to see if you already know the answers. You also have to think creatively in order to pick the right word from the choices of possible answers. Because of all these, your IQ is improved along with your memory too. Grab a copy now!