Gareth Moore

Featuring a huge number of Calcudoku puzzles at a range of sizes, all carefully sorted into order of increasing difficulty, this unique collection of 200 puzzles is full of attractively-designed challenges from best-selling puzzle author Gareth Moore, author of many international books. Calcudoku combines the row and column restraints of Sudoku with bold-lined regions that have numerical constraints. This book contains 70 puzzles at size 6x6, 70 at 7x7 and 60 at 8x8 all sorted in order of increasing logical difficulty. Puzzles contain a mix of addition, subtraction, multiplication and division signs. Printed on large, top-quality paper ideal for solving on, the 200 Calcudoku puzzles vary in difficulty from easy to hard so whatever your preference or experience you'll always find a puzzle here to suit you.

Sudoku Xtra 19 features 144 varied hand-crafted and language-neutral logic puzzles of over 50 different types, all with a unique solution which can be found without ever needing to guess. Path-finding Ultimazum is back by popular demand and this issue also introduces Kropki Sudoku and Sudoku XV along with my own Integer Multiple Sudoku. Plus there's a twist on an existing popular type with Non-consecutive Sudoku. Printed on top-quality, now even-bigger 8.5x11 inch paper ideal for solving on, other puzzles include Hanjie, Slitherlink, Yajilin, Windows, Heyawake, Nurikabe, Masyu, Hashi and many more. Other Sudoku variants include Samurai Sudoku (both 13- and 5-grid versions), Killer Sudoku Pro, Odd Pair Sudoku, Jigsaw Sudoku, Skyscraper Sudoku, Sudoku 16x16 and tens of other types.

Sudoku Xtra 18 is packed with 130 logic puzzles in a wide range of designs and sizes, from 5x5 to bigger than 30x30. Featuring lots of popular favourites, including Hanjie, Slitherlink, Yajilin, Heyawake, Nurikabe, Masyu, Hashi and many more, every puzzle can be solved without guessing. For Sudoku fans there are a huge range of variants, from a giant Consecutive Samurai 13-grid puzzle through to Killer Sudoku Pro, Odd Pair Sudoku, Jigsaw Sudoku, Skyscraper Sudoku, Sudoku 12x12 and tens of other types. Contributions from world-renowned puzzle authors in the Community Puzzles section include the awe-inspiring Knighted Samurai Shape Sudoku and the delightful shape and path-finding Tiktaka. Featuring hand-crafted puzzles from best-selling author Dr Gareth Moore, and printed on large 10"x8" high-quality paper perfect for solving on, Sudoku Xtra offers the widest range of logic puzzles in an English-language publication. There's something in Sudoku Xtra for absolutely everyone.