Puzzle types:

Finally a new volume in the Calcudoku Advanced series! Included are: puzzles using zero, negative numbers, modulo and exponentiation operators, puzzles without operators (called "no-op" or "mystery" Calcudoku), twin puzzles, and many extra large puzzles (from 10 x 10 up to 15 x 15, and even one 17 x 17!). New in this volume: more puzzle variations and more puzzles with binary operators (including the new AND operator). Note that solutions to the puzzles worth points have not been included.

This is the first issue of the new "Calcudoku Series" puzzle books. Each month there will be a new puzzle book with 100 Calcudoku puzzles of the greatest variety (from easy to difficult, with twins, "no-op" puzzles, single operator, patterned, up to 15x15 in size!), at the lowest possible price.

After two long years, the sequel to the Huge Killer Sudoku book is here, with 50 Medium puzzles, 50 Tricky ones, 75 Difficult, 15 Very Difficult, and TEN 16x16 Killer Sudokus!

Volume 3 already of the Advanced series: as volume 2, but of course with 121 new puzzles.