| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2007 | 978-0-9715815-1-7 | Ana Cecilia Petersen | An Appointment With You, Poems and Prayers |
| 2002 | 978-0-9715815-2-4 | Roger A Petersen ยท Roger A. Petersen | The Legal Guide to Costa Rica (3rd Edition) |
| 2009 | 978-0-9715815-4-8 | Roger A Petersen | The Legal Guide to Costa Rica |