I have written several reviews on Sudoku books. Generally they start of with some instructions, some are very brief and some are quite extensive. Then they give you a bunch, usually 100 to 3 or 400 puzzles. The puzzles are graded usually as 3 to 5 levels of difficulty. Then you get the solutions. Personally, I don’t find them of much use other than proof that the puzzle is solvable. In other words, you know when you’ve got it solved. How to Solve Sudoku: A Step-by-Step Guide book is very different in that it is a 116 page book dedicated to instruction and tips with just enough puzzles to apply the methods to. The only other book that even comes close is Carol Voderman’s “Master Sudoku” which I reviewed on September 30, 2005. Not only an excellent and very detailed instruction book, it covers just about everything you would like to know about Sudoku’s history, the originators, the involvement of computers in their construction and a brief look some other number puzzles we are already beginning to appear in pictures and books. Definitely the book any Sudoku Puzzler would like to have. If you don’t know all the methods and tips covered in this book, you’re ‘working’ with one hand behind your back, if not with blinders on. You can purchase this book at Amazon.