The Ugly American is a 1958 political novel by Eugene Burdick and William Lederer that depicts the failures of the U.S. diplomatic corps in Southeast Asia.
First edition cover
The Quiet American is a 1955 novel by English author Graham Greene.
First edition
Cover of the second German edition from 1956, which according to the cover inscription was on sale only 8 weeks after the first edition, implicity telling that the first had already been sold out