I know this is a little aside of from the sites focus, but I have found a large collection of paper notgeld
(well over 100 peices).
Can anyone suggest a book to help me to identify them? Color pictures and good information is the main thing I'm looking for. Values would be nice, but not important.
Though I do not collect banknotes, so have no looked on that first site, to see if what you want is there.
And yes I know you asked for books, but that site may have a list of them on there. Maybe.