Sarah Fine is a psychologist by training and a writer by passion. She began her writing journey about ten years ago and has since collaborated with four different publishers to release over twenty books, marking a surreal and wild ride in her career.

Young Adult Novels: She is the author of several books for teens, including the The Impostor Queen series, Of Metal and Wishes, the Guards of the Shadowlands YA urban fantasy series, and the futuristic psychological thriller Uncanny. Additionally, she co-authored (with Walter Jury) two YA sci-fi thrillers: Scan and its sequel Burn.

Adult Urban Fantasy Romance: Sarah has written three adult urban fantasy romance series. The bestselling Servants of Fate series includes Marked, Claimed, and Fated. The Immortal Dealers series features The Serpent, The Guardian, and The Warrior. The Reliquary series includes Reliquary, Splinter, Mosaic, and a fourth and final book.

Contemporary and Thriller Novels: She also delves into contemporary romances, with Anything Between Us being one of the latest, and has started writing psychological thrillers under the pseudonym S.F. Kosa. Her debut thriller, The Quiet Girl, was published by Sourcebooks in August 2020.

Random Facts: Beyond writing, Sarah continues to "psychologize" and enjoys the unpredictable results of combining her two passions.