If you even think you're interested, buy it.
To find out more please see the book's website.
I've just finished collecting some of the later seeds from my Shrubby St. John's-wort (I agree with the book: these are "lovely shrubs ...deserving more use in sunny yards, including edge of pools and stream gardens"), and with them I marked the end of my first year with this book. It has taken me that long to read it simply because it takes at least all four seasons to observe what it has to teach, not just about seed collection & propagation, but professional and personal lifetimes' worth of growing, conserving, observing and educating people about our native trees and many of our shrubs too. Most of it was new to me.
The first few chapters are treasures of practical and experienced seed collecting, propagation and even restoration advice. Next, specific advice about collecting and propagating by family and species. All the while, the handy reference charts at the back of the book show you month-by-month which species' mature seeds you can expect to find and their stratification protocols.
I began to read what I could already use and understand late last fall. For the 1st time in my life, I realized that the phrase "instant classic" could even be trusted. By summer it wasn't a book or a manual or even a guide so much as a wise, warm and gentle field companion. Like walking land with an extra set of the finest tuned eyes. I love how intuitively organized and accessible this book's format is, and its unmistakable voice too: like the best teachers, it doesn't care about what it 'knows' as much as presenting information and guidance in ways that will enable the reader to learn. And it knows what you want (and need) to learn, even before you do :) After awhile I had to laugh each time it inevitably anticipated and answered my questions while I was still fumbling to formulate them!
I was especially grateful each time it anticipated any confusion I would have about similar and introduced species and hybrids. Not that it's a beginner tree ID guide (I still needed those. If you do too: see native plant ID links in the right side bar. Also, after basic ID guides, Gerry Waldron's Trees of the Carolinian Forest: A Guide to Species, Their Ecology and Uses is an especially apt companion to this book), but it is uniquely helpful for fine scale ID.
To the family and friends of the late Henry Kock, co-authors and editors Paul Aird, John Ambrose and Gerald Waldron and all the good people who helped complete, fund, support and steward this important book into being: I hope you will always know you have given us all a gift that can't be measured. *thank you*.