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| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| What the FACH?! ~ The Definitive Guide for Opera Singers Auditioning and Working in Germany, Austria and Switzerland | 978-1-4357-0315-5 (1-4357-0315-4) | 2007 |
| What the Fach?! The Definitive Guide for Opera Singers Auditioning and Working in Germany, Austria, and Switzerland, 2nd Edition | 978-1-4515-7702-0 (1-4515-7702-8) | 2010 |