There are 5 books in the Thieves of Winter series.
The Thieves of Winter series does not have a new book coming out soon. The latest book, Stealing the Widow's Heart (Book 5), was published in June 2019.
The first book in the Thieves of Winter series, Jewel of Winter, was published in April 2015.
The Thieves of Winter series primarily falls into the Historical Romance genre.