Philipp Calvert
Pseudonym of Philipp Tree
4 English-language books
| Year | Type | Title | Author(s) |
|---|---|---|---|
| 2021 | Novel | The Signal | Joshua T. Calvert & Philipp Calvert |
| 2022 | Novel | The Signal 2 | Joshua T. Calvert & Philipp Calvert |
| 2022 | Novel | The Signal 3 | Joshua T. Calvert & Philipp Calvert |
| 2025 | Omnibus | The Signal: 1-3 | Joshua T. Calvert & Philipp Calvert |