There are 3 books in the Hart and Mercy series. The newest book is The Undercutting of Rosie and Adam which came out in 2025.

1
The Undertaking of Hart and Mercy

Book cover of The Undertaking of Hart and Mercy

"A uniquely charming mixture of whimsy and the macabre that completely won me over. If you ever wished for an adult romance that felt like Howl's Moving Castle, THIS IS THAT BOOK." —Helen Hoang, author of The Kiss Quotient

Hart is a marshal, tasked with patrolling the strange and magical…

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2
The Undermining of Twyla and Frank

Book cover of The Undermining of Twyla and Frank
From the author of The Undertaking of Hart and Mercy comes a heartwarming fantasy with a best friends-to-lovers rom com twist set in the delightful demigod and donut-filled world of Tanria.

The entire town of Eternity was shocked when widowed, middle-aged Twyla Banneker partnered up with her neighbor and best…

3
The Undercutting of Rosie and Adam

Book cover of The Undercutting of Rosie and Adam
From the author of The Undertaking of Hart and Mercy comes a new heartwarming fantasy rom-com with an opposites-attract twist set in the delightful, donut- and dragon-filled world of Tanria. 

Immortal demigod Rosie Fox has been patrolling Tanria for decades, but lately, the job has been losing its luster. When…