Kids of a certain age become obsessed with crossword puzzles: what are they? how do they work? when can I solve one all on my own? Word wizard David Astle has come up with a sneaky way to introduce children to the mechanics of cryptic crossword puzzles, by taking them through different kinds of wordplay - anagrams, pangrams, spoonerisms, tongue-twisters, homophones - before presenting them with crossword puzzles to solve using everything learnt so far. 'DA' puns and word plays abound, making this the word nerd's bible of wordy trickery and puzzling.