September 12th, 2026
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On Top Shelf
Fresh Pick
TRADWIFE
📚 New Books This Week 📰 Latest News 🎪 Reader Games

Snowbound secrets, shifter wars, family lies, and epic battles β€” September delivers it all.

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Some promises cost you the one you love.

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The Temple of Kronos wants her dead. The Stoneslayer wants her destroyed. Neither will have her.

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A poisoned cousin, a five-year-old's life, and a family with too many secrets.

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Betrayal runs in her blood. Justice runs in his. Together, they burn it all down.

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"ANOTHER WINNER!"
From New York Times
Bestselling Cleo Coyle

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Running from her past, she finds a killer, a protector, and her faith.

Sea Castle by Andrew Mayne

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Also by Andrew Mayne:

Chaos Man, March 2026
Trade Paperback / e-Book
Impostor Syndrome, November 2025
Trade Paperback / e-Book
Mr. Whisper, March 2025
Trade Paperback / e-Book
Death Stake, November 2024
Trade Paperback / e-Book
Dark Dive, March 2024
Trade Paperback / e-Book
Sea Castle, March 2023
Trade Paperback / e-Book
Sea Storm, April 2022
Trade Paperback / e-Book
Mastermind, September 2021
Trade Size / e-Book
Black Coral, February 2021
Trade Size / e-Book
The Girl Beneath the Sea, May 2020
Trade Size / e-Book
The Naturalist, October 2017
Trade Size / e-Book
Black Fall, April 2017
Paperback / e-Book
Name Of The Devil, July 2015
Paperback / e-Book
Angel Killer, October 2014
Trade Size / e-Book

SEA CASTLE
By: Andrew Mayne

Underwater Investigation #4
Thomas & Mercer
March 2023
On Sale: February 21, 2023
316 pages
ISBN: 1662506414
EAN: 9781662506413
Kindle: B09Q825MSK
Trade Paperback / e-Book
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Thriller

A Wall Street Journal bestselling series. A deep diving investigator is pulled into the depths of a string of unsolved serial murders in a riveting thriller by the Amazon Charts bestselling author of Sea Storm.

When a young woman washes ashore on a Fort Lauderdale beach, Sloan McPherson of the Underwater Investigation Unit is called in to consult. Sloan’s instinct says murder, but even then, there are too many questions.

For answers she reaches out to Gwen Wylder. The Miami homicide detective is notorious for being manipulative, bitter, a tyrant to her peers, and wicked smart. And she demands something in return from Sloan: fresh insight into seemingly unrelated cold-case murders and disappearancesβ€”and a possible serial killer trolling the Florida coast.

As loose ends of the old files begin to come together, another woman disappears. Sloan and Gwen are certain she’s the newest link in a deadly chain. They are determined to track her down before she dies, but they soon find themselves in uncharted waters. And the deeper Sloan and Gwen go, the stranger the case gets.

Underwater Investigation Unit

The Girl Beneath the Sea
THE GIRL BENEATH THE SEA
#1.0 β€’ May 2020
Black Coral
BLACK CORAL
#2.0 β€’ February 2021
Sea Storm
SEA STORM
#3.0 β€’ April 2022
Sea Castle
SEA CASTLE
#4.0 β€’ March 2023
Dark Dive
DARK DIVE
#5.0 β€’ March 2024

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