My sixth book of puzzles is now released (at least online) with Wei-Hwa Huang as first author. It contains just Tight Fit Sudoku. This is the easiest collection of puzzles of all the books I've written/co-written (similar to the first third of The Art of Sudoku), so a great gift for people new to sudoku variants. But it still offers some puzzles of interest to people who liked the first section of Mutant Sudoku and want to see more development of that idea. I challenge any of you to take the top book off this stack of author copies. Click the tightfitsudoku tag below to see other puzzles of this type.