Rob Lloyd Jones never wanted to be a writer when he grew up he wanted to be Indiana Jones. So he studied Egyptology and archaeology, and went on expeditions to strange places.

But all he found were interesting stories, so he decided to write them down.

Jake Atlas and the Tomb of the Emerald Snake is his third novel for Walker, although he's written about thirty other books for children, including historical non-fiction and adaptations of such classics as Jekyll and Hyde.

Rob lives in East Sussex with his wife and two young sons.

Lorena Alvarez was born and raised in Bogota, Columbia. Her work is influenced by the vibrancy and color of her home town as well as the experiences and atmosphere of the Catholic school she attended as a child.

She studied Graphic Design and Arts at the Universidad Nacional de Colombia. She has illustrated for Puffin Books, Faber & Faber, Usborne Books, Paragon, Boom! Studios, Nickelodeon and Disney.

Since 2008, she has been part of "La Procesion Puppet Club," an experimental puppetry group of illustrators and visual artists.