Otto Messmer pursued the Sunday Felix comic strips until their discontinuance in 1943, when he began eleven years of writing and drawing Felix comic books for Dell Comics that were released every other month. Jack Mendelsohn was the ghostwriter of the Felix strip from 1948 to 1952. In 1954, Messmer retired from the Felix daily newspaper strips, and his assistant Joe Oriolo (the creator of Casper the Friendly Ghost) took over. The strip concluded in 1966.
EHT Comics 