I'm still looking for a first edition of Fredrick Wertham's
Seduction of the Innocent He wrote this book in the 20's or 30's appealing to the US government regarding the violence seen in comic books of the day.
His work lead to the Comic approval stamp seen on most comic books today. Of course, the comics of those days are considered G-rated compared to what's out today... Even comic books listed in that book have higher valuves.
I do have a signed copy of Vic Elford's
Porsche Performance Driving Handbook Does that count?
I've got some older books, but I doubt they are worth anything...
-Z.