Thea Harrison

In April 2020, Harrison announced she would be writing and releasing a set of four interconnected novellas featuring Dragos and Pia, the hero and heroine of her RITA award winning novel Dragon Bound (2011). Because she had previously retired the couple from future stories, this announcement was enthusiastically received by fans who had expressed their desire for more stories about the couple in a poll Harrison held on social media and through her newsletter. The first book, The Unseen, was released in 2020. In a February 2021 announcement to fans, Harrison revealed she was going on a writing and publishing hiatus due to health reasons. As a result, plans for the novella series changed. The series was shortened to 2 novellas. The second and final novella, The Adversary, released in 2021.

The Washington Post has called her Elder Races series "fantastic." Of Dragon Bound (2011), the first novel in the Elder Races series, Publishers Weekly wrote, "Harrison goes beyond the usual vampires and werewolves to create an entertaining cast of supernatural characters." Booklist called it "an outstanding blend of romantic suspense and urban fantasy with great storytelling and world building." Publishers Weekly felt that new readers and old readers alike would "cheer" the protagonist of Oracle's Moon (2012).

In the 1980s and 1990s, Harrison wrote for Harlequin Mills & Boon under the name Amanda Carpenter. The Amanda Carpenter romances have been published in more than ten languages, and have sold over a million and a half copies worldwide. Fifteen of the Amanda Carpenter books were re-released as ebooks through 2021 and 2022 and are available for purchase.