David W. Maurer
David Warren "Doc" Maurer was a professor of linguistics at the University of Louisville from 1937 to 1972. He was an acknowledged expert in American slang, especially the lingo of grifters, pickpockets, forgers, safecrackers and other underworld characters. He wrote more than 200 journal articles, professional papers, and books in the field of linguistics.
Books

The big con
1940
ISBN 9780099409991
The American Confidence Man,
1974
ISBN 9780398029746