5 books in series

Underwater Investigation Unit

Underwater Investigation Unit is a 5-book series with 5 primary works first released in 2020 with contributions by Andrew Mayne.

Cover 3

The Girl Beneath the Sea

#1PopularFirst

2020 • 25 Readers • 328 pages • 4.2

Cover 2

Black Coral

#2

2021 • 12 Readers • 317 pages • 4

Cover 1

Sea Storm

#3

2022 • 7 Readers • 302 pages • 4

Cover 8

Sea Castle

#4

2023 • 3 Readers • 4

Dark Dive
#5

2024 • 2 Readers • 3