| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Be Happy That . . .: This Book Isn't Coated in Poison, Plus 100 Other Reasons to Cheer Up | 978-0-307-46496-5 (0-307-46496-2) | 2009 | Melissa Heckscher · Pat Mellon |
| Wees blij dat... / druk 1: dit boek niet giftig is en 100 andere opkikkers | 978-90-453-1214-9 (90-453-1214-X) | 2011 | Melissa Heckscher · Pat Mellon |