This book has lots and lots of nice patterns for mittens. There are fancy mittnes and plain mittens, many colored mittens and some textured mittens. There is also a "basic mitten" pattern, which is nice for people who either have never knit mittens before, or who wish to have a template from which to branch off in designing their own mittens. The informational sections preceding the patterns from each country, though not extensive, are interesting.
For sheer number and variety of mittnes, this book can't be beat. My personal favorites are a beautiful pair of cabled aran mittens and a fairly simple but elegant two-color pattern from the Faroe Islands. I do, however, have one criticism. The section on thumbs is, well, pathetic. The different kinds of thumbs are each given a short paragraph, but there are no diagrams or proper explanations as to how to go about knitting them. Thumbs are not terribly difficult, but as they are particular to mittens and gloves I do think that a book devoted entirely to the mitten should cover their construction clearly and thoroughly. A relatively new knitter, or even an experienced knitter who has never made mittens before, will likely need a step-by-step book with diagrams or a personal teacher to show them the thumb on their first attempt at mittens.
Thumb section aside, this book is very fine, with simple but clear photography that more than adequately shows what the mittens really look like. No specific yarns are listed for each pattern, but the weights and gauges used in ihe models are listed, so unless you want to make an exact copy of the model (and where is the fun, or for that matter the "folksiness" in that?), it should not be a problem. Overall, I highly recommend this book.