A.B Saddlewick is a pseudonym of author Tim Collins.

Tim Collins is originally from Manchester, but now lives in London. He is the author of over thirty books including Wimpy Vampire, Cosmic Colin and Dorkius Maximus. His books have been translated into over twenty languages and he has won the Lincolnshire Young People's Book Award and Manchester Fiction City.

Sarah grew up in Derbyshire, mainly under a snowdrift. She spent much of her childhood scampering in the nearby fields with a few goats. Then she decided to be sensible and studied Illustration at Falmouth College of Arts, graduating in 2001. She has illustrated for many different projects including an ad campaign for Kew Gardens entitled 'Plantastic Play'. She has also worked on commissions from The Guardian and The Independent newspapers. Sarah now specialises in funny, inky illustration and words for children's fiction and picture books. Sarah likes to paint on very big canvas. She loves funny detail, colour, music and wide open spaces. Sarah now works from a studio on a hill in Forest Hill, London.