When Kip Slater buys truthpaste instead of toothpaste, he and his friend Herbie soon realise the sensational possibilities of the purchase. They plan to feed the truthpaste disguised in a cake to the guest of honour at their school Speech Day but, unfortunately, the headmaster eats the cake first. David McKee`s delightfully comic illustrations perfectly capture the mood of his hilarious, fast-moving story about the dangers of always telling the truth. `a delightful, telling little piece of adolescent wish-fulfilment'-Observer `funny and vigorous' -Time Out.