Dr. Ken Nordberg, an 85 year-old retired dentist, He has been studying hunting-related habits and behavior of wild whitetails (plus black bears and gray wolves) since the early 1960s, scientifically from 1970 to the present over much of America. Hes been a full-time outdoor writer since 1980, writing deer hunting articles for various outdoor magazinesmore than three decades as a feature writer on deer hunting for Midwest Outdoors Magazine. He was an early pioneer and advocate of tree stand hunting and the first to accurately describe the 4-month whitetail rut with its 3 separate periods of breeding. He has developed six much improved, mature-buck-effective, fair chase stand hunting methods, which enabled his three sons and him to take 105 mature bucks on public land with high wolf and low deer numbers since 1990described in detail in his latest of 15 popular hunting books, Whitetail Hunters Almanac, 10th Edition. For more info about Doc, see his website, blogs, Twitter & Amazon.