Frog is feeling most unwell. He keeps getting hot, then cold, and something inside his chest is going thump, thump. Hare says it means he's in love, but who with? How can he show his devotion - perhaps by performing the biggest jump ever?
Max Velthuijs is one of Holland's most important creators of children's books, alongside Dick Bruna. He has won several awards, and has been the Dutch choice for the Hans Christian Andersen medal. He worked as an illustrator of posters, adverts and films after the war and then started working on children's books in the 1980s. He lives in The Hague with his son.