Ilona Andrews is a pen name for the writing duo of Ilona and Andrew Gordon, known for their work in the urban fantasy genre. They gained popularity with their series, including Kate Daniels and The Hidden Legacy, which blend elements of magic, adventure, and romance. Their books often feature strong, relatable characters and intricate world-building. The couple began writing together in the early 2000s and quickly established a dedicated fan base. Their collaborative approach allows them to combine their strengths, resulting in engaging narratives that resonate with readers. They have received several awards and nominations for their contributions to fantasy literature.