A very good reference and field guide to snakes from Texas to North Dakota eastwards, aimed at enthusiasts and accessible to the average reader. It builds on Tennant's earlier books on Texas and Florida snakes (which were excellent), and in fact the text of the species accounts is often lifted more or less directly from those books. This makes this book less than original, but the detail -- over 600 pages worth -- is very good. Lots of photos, though each are a little small. This book is thicker, more thorough and generally stronger than the companion western volume (Snakes of North America: Western Region). It also has a good bibliography. One quibble, though -- the range maps often do not extend into Canada (though the Canadian ranges of the relevant snakes are discussed in the text), which reduces the usefulness of this book for Canadian readers. Recommended.