My two go to guide books are usually written by either Rough Guides (good for cities that you might fancy visiting), and Lonely Planet (good for breezier broader stroke, larger areas), I find Moon Handbooks are targeted more at places that the other two choose not to focus on (smaller states, or smaller populations for example).
This book is generally pretty good. It's more Lonely Planet, is as much as its descriptions of smaller hamlets are pretty breezy, but if you want a guide to Vermont that looks at everything from the largest city to small towns, and villages, I defy you to come up with a better book than this.