There are 3 books in the Serendipity & Secrets series. The newest book is The Indebted Earl which came out in 2021.

1
The Lost Lieutenant

Book cover of The Lost Lieutenant
He's doing what he can to save the Prince Regent's life . . . but can he save his new marriage as well?

Evan Eldridge never meant to be a war hero--he just wanted to fight Napoleon for the future of his country. And he certainly didn't think that saving…

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2
The Gentleman Spy

Book cover of The Gentleman Spy
He only wanted a duchess for a day--but she’s determined to make it a marriage for life

When his father and older brother suddenly pass away, the new Duke of Haverly is saddled with a title he never expected to bear. To thwart the plans of his scheming family, the…

3
The Indebted Earl

Book cover of The Indebted Earl
Can Captain Wyvern keep his new marriage of convenience all business--or will it turn into something more?

Captain Charles Wyvern owes a great debt to the man who saved his life--especially since Major Richardson lost his own life in the process. The best way to honor that hero's dying wish…