The Fevered Winter is the upcoming 4th book in the Origin series. The title of the book was revealed by Jennifer L. Armentrout on an Instagram post.
Initially the book was going to be published in 2021, but Jennifer announced it was delayed due to the state of the world around that time, and the fact that the series was building up to include a massive worldwide, deadly pandemic, a virus created by shadowy government figures, and the subject of vaccines. Although the book was planned years ago and was not inspired by recent events, the author didn't feel comfortable continuing with that plotline which caused her to have to change a lot of the material.[1] It will now be published sometime in 2023, toward the middle of the year or even the fall.[2]
On July 5th, 2023 Jennifer announced nothing had changed regarding the book. She had about 13 chapters written and was feeling stuck in the writing process. Due to the fact she lost a family member to COVID anytime she sat down to write the book it got her head in a bad place. She said she didn't want to force it as she had done it in the past and it put her in a really bad headspace and also caused writer's block.[1]