Extreme Su Doku

Mark Huckvale is one of my favorite Sudoku compilers and he has provided us with a collection of new twists and enhancements of the original logic puzzles. This collection contains jigsaw (my personal favorite), maxi, triplex, and a range of the traditional puzzle which he categorizes from "difficult" (not really) to "diabolically hard". I have been a Sudoku addict for many years and it is a treat to find all these variations. The entire Huckvale seriesThe Big Book of Su Doku #2 (Mass Market Edition)The Big Book of Su Doku #1 (Mass Market Edition)The Big Book of Su Doku #3: Extreme (Mass Market Edition)are among my favorites for myself and gifts.