I love this book, too. Helpful to identify certain types of daffodils, and also to plan for more in your garden; it offers tons of advice on their culture. Anyone who loves narcissus should own a copy.
A fairly comprehensive book on the genus Narcissus. Realizing that there is around 100 species of Narcissus, this book can't possibly delve into all the details. However, it has tons of helpful information on planting, culture, naturalizing, forcing, and hybridizing daffodils. It also has numerous pages of color photos of cultivars, which I find very helpful.
I highly recommend this book for any daffodil lover. I've owned it for over a year and use it for identification purposes. Last fall I used it to help decide which new cultivars I would add to my gardens.