As crossword maker in The Age and The Sydney Morning Herald, as well as Wordplay columnist with Spectrum, David Astle is a full-time word nerd. He's the author of Wordburger - a quick-snack guide to cryptic crosswords for kids or rookies in general, as well as the time-travelling mind-trip called Riddledom. His other wordy hits include Cluetopia, plus the ultimate manual-cum-memoir, Puzzled. To complete the set are the two pocketbooks: Puzzles & Words - and Puzzles & Words 2. David has a regular column Wordwit in the Saturday SMH, Age and Canberra Times and has a weekly slot on Radio National's Sunday Extra with Jonathan Green. He is an ambassador for Dementia Australia.