Eastern Trees is very concise. It contains alot of photographs and drawings. It truly is a field guide not an encyclopedia. Although, there were times when I desired more information to identify trees first hand, I can't imagine how it could be fit into this pocket size volume. The only complaint I would have would be the photograph size since, they are about 2x3 inches they don't always show enough for identifying purposes. However, the book would have to be much bigger if the photographs were larger, size and cost would definitely increase.