Posted By:
Tom DIf you check the Amazon listing, you can see a few sample pages from the book to get an idea of the scope of the book.
It is comprehensive in that it compiles more sports (i.e. baseball, football, tennis, boxing, etc.) in one place than any other resource I've seen. It has the most detailed listing of non-player type postcards that of seen. These are mostly early 20th century cartoon or humor type postcards.
It does not list every postcard ever printed, so if that is what you want, this book will disappoint. I collect stadium postcards and it doesn't list anywhere near the thousands of postcards listed in the Crabtree book.
That said, I've found that for postcards, there is no book that has every postcard made, so I try to build a library of resources the best I can.