In Germany books written in "Fraktur" are hard to sell, because especially young people are not used to read it. Often called "old German typography" the typical "Fraktur" is found in German books of the late 19th and early 20th century, mostly common literature and popular non-fiction, printed in a large number of copies. From L.D. Mitchell we learn that there is another kind of "Fraktur", very rare and worth collecting:
"a folk art form practiced by Pennsylvania Germans principally from the mid-eighteenth to the mid-nineteenth centuries. The name derives from that of a distinctive German script marked by 'fractured' pen strokes and the form has clear roots in European folk culture. Fraktur blossomed into a uniquely rich, colorful and iconographic form of expression in the United States, tied to rites of social life."
The Private Libary about calligraphic masterpieces written in "Fraktur":
>>> Fraktur Gallery