Sara Gruen was born in Vancouver, British Columbia. She grew up in London, Ontario, and attended Carleton University in Ottawa, where she continued to live for 10 years after her graduation.
Gruen moved to the United States from Ottawa in 1999 in order to take a technical writing job. When she was laid off two years later, she decided to try writing fiction. Gruen is an animal lover; both her first novel, Riding Lessons, and her second novel, Flying Changes, involve horses. Gruen's third book, the 1930s circus drama Water for Elephants, was initially turned down by her publisher at the time, Avon Books, forcing Gruen to find another publisher. It went on to become a New York Times bestseller and is now available in 44 languages and as a 2011 film adaptation starring Reese Witherspoon, Christoph Waltz, and Robert Pattinson. Her fourth novel, Ape House, centers around the Bonobo ape and was sold to Spiegel & Grau on the basis of a 12-page summary.
Gruen’s awards include the 2007 Book Sense Book of the Year Award, the Cosmo Fun Fearless Fiction Award, the Bookbrowse Diamond Award for Most Popular Book, the Friends of American Literature Adult Fiction Award and the ALA/Alex Award 2007.
Sara Gruen lives in North Carolina, with her husband, three sons, and seven animals