Sarah J. Maas is an American fantasy author and one of the defining names in modern romantasy, best known for the Throne of Glass, A Court of Thorns and Roses, and Crescent City series. Her debut, Throne of... Glass, introduced her talent for long-form fantasy arcs built around fierce heroines, court politics, magic, betrayal, and emotional transformation. A Court of Thorns and Roses brought her wider crossover success by fusing fairy-tale fantasy, sensual romance, war, and character-driven drama, while Crescent City moved her storytelling onto a larger adult urban-fantasy canvas. Across her work, Maas is known for immersive worlds, escalating relationships, mythic reveals, found family, and high-stakes romance that feels central to the fantasy rather than separate from it.