Underwater Investigation Unit Books in Order
Below you'll find the complete list of Underwater Investigation Unit books in publication order. This is generally the recommended reading order for the series.
Reading order verified: January 2026
Publication Order
The Girl Beneath the Sea
Buy on Amazon2020
Black Coral
Buy on Amazon2021
Sea Storm
Buy on Amazon2022
Sea Castle
Buy on Amazon2023
Dark Dive
Buy on Amazon2024
Frequently Asked Questions
The recommended reading order for the Underwater Investigation Unit series is publication order: 1. The Girl Beneath the Sea (2020), 2. Black Coral (2021), 3. Sea Storm (2022), 4. Sea Castle (2023), 5. Dark Dive (2024). This is generally the best way to experience the story as the author intended.
The Underwater Investigation Unit series by Andrew Mayne contains 5 books. The series began in 2020 and continues to be a popular choice for readers.
The Underwater Investigation Unit series is written by Andrew Mayne. You can find more books and series by this author on our website.
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