Briggs began writing in 1990 and published her first novel Masques in 1993. She wrote primarily in the fantasy genre until her editor asked her to write an urban fantasy, since the genre was showing promising growth. Briggs wrote Moon Called, which was published in 2006 and made it to the USA Today bestseller lists. The second book in the series, Blood Bound, hit The New York Times Best Seller list. The third book, Iron Kissed, was a number one New York Times bestseller and subsequent novels have continued to perform similarly in sales.