| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2004 | 978-0-9759992-0-2 | Paul Mahler | VoIP Telephony with Asterisk |
| '' | 978-0-9759992-1-9 | Paul Mahler | VoIP Telephony with Asterisk Book & Installation CD |
| 2005 | 978-0-9759992-2-6 | '' | VoIP Telephony with Asterisk: A systematic Approach to Learning the Open Source PBX |