Thousands of readers have had their experience of being in a forest changed forever by reading Tom Wessels's Reading the Forested Landscape. Was this forest once farmland? Was it logged in the past? Was there ever a major catastrophe like a fire or a wind storm that brought trees down?

Now Wessels takes that wonderful ability to discern much of the history of the forest from visual clues and boils it all down to a manageable field guide that you can take out to the woods and use to start playing forest detective yourself. Wessels has created a key--a fascinating series of...