Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | The Naturalist | 2017 | Andrew Mayne | Buy |
| 2 | Šelma | 2017 | Andrew Mayne | N/A |
| 3 | Looking Glass | 2018 | Andrew Mayne | Buy |
| 4 | Powiększenie | 2018 | Andrew Mayne | N/A |
| 5 | Murder Theory | 2019 | Andrew Mayne | Buy |
| 6 | Dark Pattern | 2019 | Andrew Mayne | Buy |
| 7 | The Girl Beneath the Sea | 2020 | Andrew Mayne | Buy |
| 8 | Black Coral | 2021 | Andrew Mayne | Buy |
| 9 | Sea Storm | 2022 | Andrew Mayne | Buy |
| 10 | Sea Castle | 2023 | Andrew Mayne | Buy |
| 11 | Dark Dive | 2024 | Andrew Mayne | Buy |
The Naturalist series is Andrew Mayne’s most popular work, introducing Theo Cray, a computational biologist who becomes an unlikely crime-solver. The first book (2017) follows Cray as he realizes that deaths in rural Montana fit a pattern that no one else has noticed. His scientific training lets him see connections that traditional investigators overlook.
The series has expanded to 11 books, with later entries moving into underwater crime scenes and international settings. Some books overlap with the Underwater Investigation Unit series as Cray’s investigations take him into new territory. The combination of real scientific concepts with thriller plotting gives the series its distinctive hook.