Popular series of 5 books for enjoying difficult Sudoku puzzles. * Masterpiece Ultra-Difficult Sudoku Premium Sunshine 145 Selections * Masterpiece Ultra-Difficult Sudoku Premium Elf's Sanctuary 145 Selections * Masterpiece Ultra-Difficult Sudoku Premium Palace of Light 145 Selections * Ultimate Selection Ultra-Difficult Sudoku Premium Sharaku 145 Selections * Masterpiece Ultra-Difficult Sudoku Premium Black Dragon's Mansion 145 Selections There are creases where the pages have been opened. Also, some pages have stains as shown in photos 7, 8, and 9. There is also writing on all pages as shown in photo 11, which has been erased with an eraser, but some marks remain. Please be aware that there may be some writing that was missed. Please understand that these are used items, and purchase accordingly. #Sudoku #Sudoku