Complex sentence: The series was written by a number of ghostwriters and, despite going out-of-print twice, lasted from 1934 to 1979; the books have also been translated into a number of other languages.
Split into simpler sentences: The series was written by a number of ghostwriters and, despite going out-of-print twice, lasted from 1934 to 1979. The books have also been translated into a number of other languages.