The Speckled Panic by Hazel Townson
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.