A Field Guide to the Ferns and Their Related Families of Northeastern and Central North America With a Section on Species Also Found in the British Isles
Concerning the original 301-page work without photographs.
This book introduced me to the world of the Pteridophyta. It is an excellent guide for someone interested in knowing more about the structure and identifying features of ferns, clubmosses, spikemosses, horsetails and quillworts. I have graduated to higher-level materials (and the taxonomy is a bit out of date) but this book is highly recommended to the beginner.
A complete guide to the just over 100 species of ferns and fern relatives in Northeastern and Central North America; beautiful hand drawn illustrations supplemented with color photographs.