If you buy the Times mainly for the crossword then this is cheaper. If you just want to get better by practice or you are addicted this is for you. Kept me amused for ages. The creme de la creme of crosswords.
The main content of this book is up to the standard of the rest of the series - for which see my review of The "Times" Crossword: Bk. 12 (Times Crossword). An unfortunate slip-up: the introductory puzzle (which is used to give you a very quick "how to solve" guide) is apparently printed with the wrong grid. So if that section is important to you, maybe get book 12 instead or as well - this has the same sample puzzle with the right grid.