A reworking of ideas previously published in, Numbers everywhere. / David Hale, Peter Wells. 1972 - Turning the tales. / David Hale, Peter Wells. 1972 - Fifteen starters for secondary education. / David Hale, Peter Wells. 1973.
30 years on -- : numbers everywhere, turning the tables and 15 starters revisited. ISBN 1898611181. Published by ATM in 2002. Publication and catalogue information, links to buy online and reader comments.