511 books • 54 series
Master of Puzzles - Sudoku Tridoku 200 Easy to Medium Puzzles Vol.5 (Sudoku Tridoku, #5)
Master of Puzzles Skyscrapers - 200 Easy to Medium Puzzles 8x8 Vol. 7 (Skyscrapers, #7)
Master of Puzzles Skyscrapers - 400 Easy to Master Puzzles 6x6 Vol. 9 (Skyscrapers, #9)
Master of Puzzles Skyscrapers - 200 Easy to Medium Puzzles 7x7 Vol. 5 (Skyscrapers, #5)
Master of Puzzles Skyscrapers - 200 Hard to Master Puzzles 8x8 Vol. 8 (Skyscrapers, #8)
Master of Puzzles Skyscrapers - 200 Hard to Master Puzzles 7x7 Vol. 6 (Skyscrapers, #6)
Master of Puzzles Skyscrapers - 400 Easy to Master Puzzles 7x7 Vol. 10 (Skyscrapers, #10)
Master of Puzzles Skyscrapers - 400 Easy to Master Puzzles 9x9 Vol. 12 (Skyscrapers, #12)