New York Post the Doctor Will See You in a Minute Sudoku: The Official Utterly Addictive Number-Placing Puzzle

This is a collection of 100 Su Doku puzzles -- 5 easy, 25 mild (I'm never quite sure what "mild" means), 30 difficult, and 40 fiendish -- one per page. I generally agreed with the individual puzzle ratings (an occasional disagreement is usually because I stumbled on the trick to a harder Su Doku, or missed the obvious on an easier one). Given the ratio of easy to hard puzzles, this is not the book for a Su Doku newcomer. Beginners should try New York Post Easy Sudoku: The Official Utterly Addictive Number-Placing Puzzle (New York Post Su Doku) and then New York Post Mild Su Doku: The Official Utterly Addictive Number-Placing Puzzle instead. The good news: For purists, the givens are arranged symmetrically, as is tradition for Su Doku puzzles. The cells are decent size. There's a 15-page solving guide at the front. The bad news: That 15-page solving guide omits the first thing it should have, the one-sentence rule for solving Su Doku puzzles (another reason this isn't the right book for a beginner). Puzzles 24 and 25 are duplicates (the solution for 25 corresponds to both, so it was a shock when I completed 24 and went to check it, only to find that nothing matched!). The running footers on the right-hand pages give the degree of difficulty (a good thing when you're randomly picking a puzzle to solve), but the first two right-hand pages of the "mild" section have "easy" as the footer, and the last six right-hand pages of the "mild" section have "difficult" as the footer. The duplicated puzzle and the incorrect footers are indications of sloppy proofreading, which certainly doesn't increase one's confidence in the correctness and uniqueness of the puzzles.