394 books • 40 series
CalcuDoku Puzzles - 200 Hard to Very Hard Puzzles 9x9 (book 20) (Calcudoku Puzzles, #20)
CalcuDoku Puzzles - 200 Hard to Very Hard Puzzles 6x6 (book 18) (Calcudoku Puzzles, #18)
Variety Logic Puzzles - Hidoku, Minesweeper 200 Hard Puzzles 9x9 Book 23 (Variety Logic Puzzles, #23)
Variety Logic Puzzles - Hidoku, Minesweeper 200 Very Hard Puzzles 9x9 Book 24 (Variety Logic Puzzles, #24)
Variety Logic Puzzles - Hidoku, Minesweeper 200 Easy Puzzles 9x9 Book 21 (Variety Logic Puzzles, #21)
Variety Logic Puzzles - Hidoku, Minesweeper 200 Normal Puzzles 9x9 Book 22 (Variety Logic Puzzles, #22)