| title | ISBN-13 | year of publication |
|---|---|---|
| Colori. Simboli, storia, corrispondenze. Ediz. illustrata | 978-88-317-9931-7 | 2010 |
| Colors. Symbols, history, correlations. Ediz. illustrata | 978-88-317-9973-7 | 2009 |
| Con Ingrid tra colline viola | 978-88-6869-065-6 | 2015 |
| With Ingrid among the purple hills | 978-88-6869-076-2 | 2015 |