O. M. · Olaf Matthes · Olaf Mietz · Olivia Mattis
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Alibis & Angels | 978-1-4328-6387-6 (1-4328-6387-8) | 2019 |
| Mayhem & Mass | 978-1-4328-5638-0 (1-4328-5638-3) | 2018 |
| Peril & Prayer | 978-1-4328-5962-6 (1-4328-5962-5) | 2019 |