158 books • 21 series
250 Medium Numbricks Puzzles 7x7 (Numbricks, #10)
250 Hard Numbricks Puzzles 7x7 (Numbricks, #11)
250 Extreme Numbricks Puzzles 8x8 (Numbricks, #19)
250 Medium Numbricks Puzzles 9x9 (Numbricks, #3)
250 Easy Numbricks Puzzles 9x9 (Numbricks, #2)
250 Extreme Numbricks Puzzles 9x9 (Numbricks, #5)
250 Easy to Medium Numbricks Puzzles 8x8 (Numbricks, #20)
250 Medium to Hard Numbricks Puzzles 8x8 (Numbricks, #21)
250 Extreme Numbricks Puzzles 7x7 (Numbricks, #12)
250 Easy Numbricks Puzzles 8x8 (Numbricks, #16)
250 Medium Numbricks Puzzles 8x8
250 Easy to Medium Numbricks Puzzles 9x9 (Numbricks, #6)
250 Hard Numbricks Puzzles 9x9 (Numbricks, #4)
250 Medium to Hard Numbricks Puzzles 9x9 (Numbricks, #7)