158 books • 21 series
250 Medium to Hard Hidoku Puzzles 8x8 (Hidoku, #14)
250 Easiest Hidoku Puzzles 7x7 (Hidoku, #15)
250 Extreme Hidoku Puzzles 8x8 (Hidoku, #12)
250 Medium Hidoku Puzzles 8x8 (Hidoku, #10)
250 Medium to Hard Hidoku Puzzles 7x7 (Hidoku, #21)
250 Hard Hidoku Puzzles 8x8 (Hidoku, #11)
250 Hard Hidoku Puzzles 7x7 (Hidoku, #18)
250 Easiest Hidoku Puzzles 8x8 (Hidoku, #8)
250 Easy Hidoku Puzzles 8x8 (Hidoku, #9)
250 Easy to Medium Hidoku Puzzles 7x7 (Hidoku, #20)
250 Easy Hidoku Puzzles 7x7 (Hidoku, #16)
250 Easy Hidoku Puzzles 9x9 (Hidoku, #2)
250 Easy to Medium Hidoku Puzzles 9x9 (Hidoku, #6)
250 Easiest Hidoku Puzzles 9x9 (Hidoku, #1)
250 Extreme Hidoku Puzzles 9x9 (Hidoku, #5)
250 Medium Hidoku Puzzles 9x9 (Hidoku, #3)
250 Hard Hidoku Puzzles 9x9 (Hidoku, #4)
250 Easy to Medium Numbricks Puzzles 7x7 (Numbricks, #13)
250 Easiest Numbricks Puzzles 9x9 (Numbricks, #1)
250 Easy Numbricks Puzzles 7x7 (Numbricks, #9)
250 Hard Numbricks Puzzles 8x8 (Numbricks, #18)
250 Medium to Hard Numbricks Puzzles 7x7 (Numbricks, #14)
250 Easiest Numbricks Puzzles 8x8 (Numbricks, #15)
250 Easiest Numbricks Puzzles 7x7 (Numbricks, #8)