Whitney Sanderson grew up riding horses as a member of a 4-H club and competing in local jumping and dressage shows. She has written several books in the Horse Diaries chapter book series. She is also the author of Horse Rescue: Treasure, based on her time volunteering at an equine rescue farm. She lives in Massachusetts.

Jomike Tejido is an author and illustrator of the picture book There Was an Old Woman Who Lived in a Book. He also illustrated the Pet Charms and My Magical Friends leveled reader series. He has fond memories of horseback riding as a kid and has always loved drawing magical creatures. Jomike lives in Manila with his wife, two daughters, and a chow chow named Oso.

"Die-hard unicorn fans' hearts will sing." -School Library Journal