Graeme C. Simsion is a New Zealand-born Australian author, screenwriter, playwright, and data modeller, best known for his first novel The Rosie Project. He is a former IT consultant and the author of two nonfiction books on database design who decided, at the age of fifty, to turn his hand to fiction. His first novel, The Rosie Project, was published in 2013 and translation rights have been sold in forty languages. Movie rights have been optioned to Sony Pictures. The sequels, The Rosie Effect, and The Rosie Result, were also bestsellers, with total sales of the series in excess of five million.

Graeme's third novel was The Best of Adam Sharp, a story of a love affair re-kindled - and its consequences. Movie rights have been optioned by Vocab Films / New Sparta Films with Toni Collette attached to direct. Creative Differences was originally created as an 'Audible Original' audiobook.