The Sunday Times Concise Crossword Book 4: 100 Challenging Crossword PuzzlesA crossword to test your general knowledge with 100 puzzles of moderate difficulty with one or two more teasing clues to tax you more fully. A satisfying challenge to stimulate the brain cells. Do you find cryptic crosswords too much of a chore? Do you want your general knowledge and word power to be tested but not put through the mill? Are you on the lookout for something to pass the time on a train or plane journey? We have just what you are looking