| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| The Christmas Companion | 978-1-84525-064-5 | 2008 | Think Books |
| The Curry Companion | 978-1-84525-034-8 | 2006 | |
| The Little Green Book of Big Green Ideas | 978-1-84525-002-7 | 2005 | |
| The Scout's Companion | 978-1-84525-043-0 | 2007 | |
| Why? | 978-1-84525-009-6 | 2005 | |