Welcome to this extraordinary book of sudoku variant puzzles known as CLUELESS Sudoku!This is a book for experienced sudoku solvers. It contains a variant of sudoku puzzles which consists of 9+1 sudoku grids. The 9 grids are laid out next to each other, forming a 3 by 3 matrix of Sudoku grids. At first glance, it might look like there are just 9 separate sudoku puzzles there, but that's not true!There is also a 10th sudoku grid - hidden among the 9 other grids. It takes one 3x3 box from each of the 9 grids, forming a new, full 9x9 sudoku grid. The 3x3 boxes from each of the 9 grids are shaded, so you'd know where to look.And to make things a bit more complicated - the constituent 3x3 boxes of the 10th grid are completely clueless! There are no starting numbers in them. So you must slowly fill in the numbers and let the 10 grids interact with one another.But wait! That's not all! The final 5 puzzles in this book are a gift from the author. They are variants of Clueless Sudoku: diagonal, consecutive, non-consecutive, jigsaw and killer versions!It's a very special book with very special puzzles for very special people!Hope you will like it: )