| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Annuals for Minnesota and Wisconsin | 978-1-55105-381-3 | 2004 | Don Williamson |
| Best Garden Plants for Minnesota and Wisconsin | 978-1-55105-500-8 | 2006 | " |
| Gardening Month by Month in Michigan | 978-1-55105-363-9 | 2004 | Tim Wood · Don Wiliamson |
| Gardening Month by Month in Minnesota and Wisconsin | 978-1-55105-383-7 | 2004 | Don Williamson |
| Perennials for Minnesota and Wisconsin | 978-1-55105-385-1 | 2004 | " |
| Tree and Shrub Gardening for Minnesota and Wisconsin | 978-1-55105-483-4 | 2005 | " |