Complex sentence: Ziff-Davis acquired Amazing Stories in 1938, sacked then editor T. Connor O'Sloane and, on the recommendation of popular author Ralph Milne Farley, offered the editorship to Palmer.
Split into simpler sentences: Ziff-Davis acquired Amazing Stories in 1938. The publisher sacked then editor T. Connor O'Sloane and, on the recommendation of popular author Ralph Milne Farley, offered the editorship to Palmer.