There are 6 books in the The Deep Series series. The newest book is Deep Hex which came out in 2023.

1
Deep Shadow

Book cover of Deep Shadow

In the turquoise waters of the Caribbean, something lethal is on the move.

Scuba divers travel from all over the world to visit the little island of Bonaire, with its crystal-clear waters and a host of beautiful marine life. After three years in the “Diver's Paradise”, divemaster Boone Fischer thought…

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2
Deep Cut

Book cover of Deep Cut
Sometimes, the brightest corners of the world can hold the darkest shadows.

Rising steeply from the turquoise waters of the Caribbean, the Dutch island of Saba is a sleepy paradise, the mountainous slopes dotted with little red-and-white cottages and the seas teeming with life. But this little oasis has a…

3
Deep Roots

Book cover of Deep Roots

In the mangroves of Belize, something ancient lies hidden beneath the roots. And when it surfaces, so too will one of man's baser inclinations. The root of all evil: GREED.

Boone Fischer and Emily Durand have enjoyed months of quiet on the tiny island of Caye Caulker. After surviving Hurricane…

4
Deep Devil

Book cover of Deep Devil

Between the devil and the deep blue sea... is the last place you want to be.

Boone Fischer and Emily Durand have been through a lot in the past few years. A new beginning on the island of Cozumel is going swimmingly: their own dive boat, their own business, a…

6
Deep Hex

Book cover of Deep Hex
A new home can bring new friends... new adventures... and new dangers.

Boone Fischer and Emily Durand have settled down in the Turks and Caicos—specifically, the picturesque island of Grand Turk. But a chance encounter with a dive boat from a nearby island leads them to pull up stakes again,…