The Casebook of Lucius Leffing

From Author Wars - https://authorwars.com/books/the-casebook-of-lucius-leffing-1926572.html

Overview:

Title: The Casebook of Lucius Leffing
Author: Neal MacDonald, Jr.
Year: 1973
Type: Cover Art

Variant Titles:

1973. The Casebook of Lucius Leffing