Sudoku 300 has 100 easy, 100 medium, and 100 hard puzzles which are ideal for beginners just starting, and great for seniors with the large print two puzzles per page book. I have included some basic instructions for beginners on how to solve the puzzles at the start of the book, it's enough to get you started. The book has three sections with answers after each section.•100 Easy with answers.•100 Medium with answers.•100 Hard with answers. The book is 8.5 x 11 inches with 234 pages, and with two puzzles per page, they are large enough to write your notes in the squares and around the outside of the puzzle.