HarperCollins · Monster Publications
| title | ISBN-13 | year of publication |
|---|---|---|
| Morello Letters Signed Edition | 978-1-84579-439-2 | 2006 |
| More Morello Letters: Pen Pal to the Super Stars | 978-0-9563422-2-5 | 2011 |
| The Morello Letters: Penpal to the Stars | 978-0-9563422-0-1 | 2009 |
| The Morello Letters: Pen Pal to the Stars | 978-0-00-724124-8 | 2007 |
| The Morello Letters: Pen Pal to the Stars | 978-0-00-724123-1 | 2006 |
| Yours Sincerely, RM Morello | 978-0-00-726438-4 | 2007 |