Ian Tregillis is an American author known for his intricate and meticulously researched alternate history novels, particularly his "Milkweed Triptych" and "Alchemy Wars" series. His writing is characterized by detailed world-building, complex characters, and a focus on themes of science, magic, and political intrigue, often set in meticulously crafted historical settings. Tregillis frequently collaborates with other writers, notably on the "Witch Who Came In From The Cold" series.











