Pip Jones lives in East London with her partner, her two daughters and a real invisible cat (it doesn't catch mice, but it doesn't need a litter tray either, so there are pros and cons).

She writes a lot. She even owns a writing cloak! And she spends days on end working out how to get good rhymes, such as 'snuffle' and 'kerfuffle', into stories. Pip won the inaugural Greenhouse Funny Prize in 2012 with Squishy McFluff, The Invisible Cat, her first book.

Sara Ogilvie is an illustrator and printmaker. She was the 2011 Booktrust Best New Illustrators Award winner and was shortlisted for the Best Emerging Illustrator Award 2010.

Dogs Don’t Do Ballet, which she illustrated, was shortlisted for the Roald Dahl Funny Prize 2010 and the Booktrust Early Years Award 2010. Sara lives in lives in Newcastle upon Tyne in the North of England.