Excellent reference on irises with lots of lovely photos. It has sections on the various types of irises (bearded, siberian, louisiana, bulbous, waterside, drought tolerant, and shade loving irises), with detailed information about the culture of each. I learned a lot from this book about which irises to select for my region and how to grow them.
I've borrowed this one from our library (I have it out on loan right now, in fact); it's most definitely a helpful book, especially to those who are fairly new to irises (or wanting to learn more about the various types.)
I own this book. Another great book! 169 pages (in hardback) of great detailed information, with photos that show and help to explain the material he is covering.
Whether he is discussing "space age irises", or "form", or "digging and dividing", or "pests" (like the iris borer moth) you'll find detailed pictures within the topic showing exactly what he is talking about.
This book covers everything from a guided tour of the Genus Iris, to ordering irises, to growing them, to amending and mulching the soil, to bloom care, to diseases and pests, to hybridizing, to growing them from seed, and on and on. A WEALTH OF INFORMATION!