| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Color & Texture: Decorative Expressions for Today's Home | 978-1-58663-031-7 | 2000 | Ellen Plante · Ann Rooney Hever · Penelope O'Sullivan |
| Ortho's All About Bonsai | 978-0-89721-498-8 | 2004 | Ortho · Penelope O’Sullivan |
| Ortho's All About Shrubs and Hedges | 978-0-89721-432-2 | 1999 | Penelope O'Sullivan |
| Stone and Marble | 978-1-58663-532-9 | 2002 | penelope-o-sullivan |
| The Homeowner's Complete Tree & Shrub Handbook: The Essential Guide to Choosing, Planting, and Maintaining Perfect Landscape Plants | 978-1-58017-570-8 | 2007 | Penelope O'Sullivan |
| The Pruning Answer Book: Solutions to Every Problem You'll Ever Face; Answers to Every Question You'll Ever Ask | 978-1-60342-710-4 | 2011 | Lewis Hill · Penelope O'Sullivan |
O's · O'Sullivan · P. O'Sullivan · P S · P. Sullivan · Penelope O’Sullivan · Penelope OSullivan · Penelope Sullivan
Ortho · SparkNotes · Storey Publishing, LLC