Clarence L. Towe
This is the first (and only) book devoted exclusively to North America's 15 species of native deciduous azaleas, and includes information on site selection, soil preparation, companion plantings, and propagation.
This book is out of print, but still useful! Check out your local used bookstores or an online source like AbeBooks.
To select from a dropdown list of genera, type only the first 2-3 letters.
If "briar" doesn't deliver the results you want, try an alternate spelling such as "brier", etc.