In the dark town of Grislygust a competition is under way - The Great Grislygust Grow-off. Marvin plans to grow the tastiest tomatoes in town but his beastly brother Boris an his poisonous sister Prunella make fun of him. 'You're a titchy weed, Marvin, and your tomatoes will be tiny too!' But Marvin is determined to prove everybody wrong and soon his competitors will find themselves in big trouble.
Jim and Karen live in South London. Karen still works as a textile designer when she's not creating picture books, and Jim works in the publishing industry. They have won the picture book category of the Sheffield Book Award for their first book Letterbox Lil (OUP) and received the silver Practical Parenting award for Who are you, Stripy Horse in 2007.