Detective Comics #572 (1987)

Detective Comics 50th Anniversary issue featured Batman meeting up with the original caped crusader.

Extra-sized Anniversary issue! A mystery brings together the greatest sleuths of our time: Batman and Robin, Elongated-Man, Bradley P.I., and the greatest sleuth of all time, Sir Arthur Conan Doyle's Sherlock Holmes.

Title: Detective Comics #572
Author: Mike W. Barr
Year: 1987
Publisher: DC Comics
Purchase: Amazon