It is a book for birders of all levels. In origin and concept it is an expanded introduction to the field guide. It covers all of the fundamentals of bird identification with the goal of helping you understand the techniques of birding and the patterns of variation in birds. In that way it will help …
A “flexibound” binding is a flexible cover that is thicker than a typical paperback and extends beyond the page edges. It is intermediate between the traditional “paperback” and “hardcover” styles, and many sellers simply list it as one of those categories, causing some confusion.
They are all the same (with one exception). The Sibley Guides to Birds and Trees have only one binding, called “flexibound”. It is a flexible cover, thicker than a typical paperback and extending beyond the page edges. It is intermediate between the traditional “paperback” and “hardcover” styles, and many sellers list it as one of …