I was drawn to this because of the great price, but I got the bonus of puzzles I knew for sure I hadn't done, as the book's from 1989.
I was very curious about what would constitute a "used" crossword-puzzle book. The only evidence I've found of that is the five or six (of 200) puzzles that were started, all by what seems to be the same person, all in ink. Each of them has no more than a dozen or so squares filled in. (Was it a man or a woman? What happened to them? How did the book end up at the used-book vendor?)
These are witty and challenging as only The Sunday Times puzzles can be. They are also a reminder of how much cultural references have changed in a short time.