She is the best-selling author of Seven Tears into the Sea, The Phantom Stallion series for young readers about the contemporary and historic West, and many nonfiction magazine articles.
Farley wrote the adult-oriented romance series Magical Love and Haunting Hearts under the pen name Tess Farraday.
[4] Her 2015 book Wild at Heart: Mustangs and Young People Fighting to Save Them documenting the plight of wild horses in the North American West,[5] published by Houghton Mifflin Harcourt, was selected as a Junior Literary Guild Selection[6] as well as winner of the Sterling North Heritage award for Excellence in Children's Literature.
It was also recommended by the American Association for the Advancement of Science, and a finalist for Best Western Juvenile Nonfiction by the Western Writers of America[7] She is a founding member of the Society of Children's Book Writers and Illustrators' mentor program.
[9] Seven Tears into the Sea was nominated for the ALA Best Books for Young Adults Award.