Iron Widow

In March 2020, Xiran Jay Zhao signed a two-book deal with Penguin Teen Canada[9] for a reimagining of the rise of Wu Zetian, the only female emperor of China who ruled during the late 600s.[10][11][12] Rock the Boat, the children's imprint of Oneworld Publications, acquired the UK rights in May 2021.[13] Iron Widow, Zhao's debut novel, was released on September 21, 2021.[14][15]

In an interview with Publishers Weekly, Zhao stated that "there's no other woman in Chinese history who had a rise through the harem as iconic as hers... It's been incredibly fun to reimagine her as instead a teenage peasant girl in an intensely misogynistic world who suddenly gains access to giant fighter mechas—how would she change her world?"[16] Numerous anime shows, such as Neon Genesis Evangelion, Digimon, and Attack on Titan served as inspiration for Iron Widow. In particular, Zhao in a Twitter thread said the story was written partly in response to their disappointment in the direction DARLING in the FRANXX took in its later episodes.[17]

• Wu Zetian: a peasant girl who becomes the titular "Iron Widow" and co-pilot for the Vermilion Bird Chrysalis. She seeks to topple the sexist society of Huaxia after her sister is sacrificed as a pilot.
• Li Shimin: the "Iron Demon", Wu Zetian's half-Rongdi co-pilot for the Vermilion Bird, a former death row inmate who was spared for having the strongest qi in the history of modern Huaxia. He is an alcoholic and has a tendency to lash out to express his anger, however he has a gentler and sensitive side underneath.
• Gao Yizhi: Zetian and Shimin's love interest, the gentle and elegant fifth son of the biggest media mogul in Huaxia who forms a polyamorous relationships with Zetian and Shimin and works to keep them alive against political forces that would have them disposed of. He is a composite character inspired by several lovers of the historic Empress Wu.[18]
• Gao Qiu: The richest media mogul in Huaxia and a corrupt businessman with underground ties to spread his influence. Initially dismissive, he eventually agrees to exclusive and lucrative media contracts to support Zetian and Shimin's public image.
• Sima Yi: A senior strategist and Zetian and Shimin's reluctant handler and trainer.
• An Lushan: Chief strategist for the Sui-Tang frontier. He treacherously seeks to remove Zetian and Shimin from battle by sending them on suicide missions and is later interrogated by the two for his knowledge of the Chrysalis pilot system.
• Dugu Qieluo & Yang Jian: The female and male pilots, respectively, of the White Tiger Chrysalis. Qieluo is cold and hostile toward Zetian's attempts at friendship.
• Ma Xiuying & Zhu Yuanzhang: The female and male pilots, respectively, of the Black Tortoise Chrysalis. Xiuying is initially friendly toward Zetian, offering advice, while Yuanzhang is openly hostile toward Shimin and Qieluo for their Rongdi heritage.
• Emperor Qin Zheng: A legendary ruler of Huaxia and pilot of the Emperor-class Chrysalis the Yellow Dragon. Qin Zheng's spirit pressure is unmatched beyond any pilot in existence. He contracted a disease called flower pox and used the natural qi of the Kunlun Mountains to suspend himself in stasis until a cure could be found. Rumors say he remains there still, but the territory surrounding him has been lost to the Hunduns for over 200 years.
• Yang Guang: the male pilot of the Nine-Tailed Fox Chrysalis, and the target of Wu Zetian's revenge for murdering her sister.
• The Heavenly Council: The mysterious and unseen gods who aid Huaxia. They have never been seen in person or recorded, but they provided humanity with the lost technology to rebuild society after the Hunduns destroyed civilization. Defeated Hundun husks are harvested and given as offerings to the Heavenly Council or reshaped into Chrysalises. The ruling Sages take their orders from the Heavenly Council.

Jessica Singer, for CBC News in August 2021, highlighted the impact of BookTok on sales of young adult fiction. Singer wrote that "books like Iron Widow by Canadian author Xiran Jay Zhao are already gaining popularity online, even before the book's release date in late September".[19] Kara Savoy, Penguin Random House Canada's integrated marketing director, told Singer that "it's one of the books that we've really been sending out to Canadian influencers. When Xiran did an unboxing video of their advanced copies a few weeks ago [on TikTok], the pre-sale numbers in the U.S. went up 600 per cent that week".[19] Iron Widow reached #1 in the Young Adult Hardcover category of New York Times Best Sellers in the first week after its release.[4] The week of January 2, 2022, the book had slipped to #5 and had been on the New York Times Best Sellers for eleven weeks.[20] As of May 2022, the book has remained on the New York Times Best Sellers for 28 weeks.[21]

The book received generally positive reviews, with commentators noting the queer and feminist themes. Linda Codega of Tor.com stated that the "worldbuilding is imaginative and explosive, the strange mix of mecha battles and reimagined characters lighting up the fight scenes and adding a new mythology to historical fantasy" but that the book didn't go "far enough to examine the underlying misogyny and transphobia" the characters faced from the oppressive society.[22] Mimi Koehler of The Nerd Daily, however, found the book "takes a deep dive into the unrelenting and unfair gender roles Wu Zetian's society tries to uphold at any cost and how that not only affects how people treat her but how she, in par, treats others," comparing it to Pacific Rim and The Handmaid's Tale.[23]

The book was listed on multiple end-of-year roundups. The Boston Globe included Iron Widow on their "Best Books of 2021" list and stated that the book is an "intense, feminist page-turner".[24] CBC Books included it on their "The best Canadian middle-grade and YA books of 2021" list.[25] Business Insider highlighted that the Iron Widow is on "The 20 most popular young adult reads of 2021" list based on Goodreads reviewers.[26]

Zhao initially announced that the sequel, titled Heavenly Tyrant, would be released in Spring 2023,[36] however, they later announced that the release would be delayed to April 30, 2024.[37][38] They earlier hinted on their Tumblr blog that the novel "will be a partial Three Kingdoms retelling".[39]

• In September 2022, Picturestart optioned the film rights to Iron Widow. It was announced that J.C. Lee was hired to write the screenplay and that the film will be produced by Erik Feig, Jessica Switch and Julia Hammer.[40][41]