Complex sentence: A number of books have been written about or have mentioned the assault and in 1962 Operation Deadstick featured in Darryl Zanuck's film "The Longest Day" which was based on the book of the same title by Cornelius Ryan.
Split into simpler sentences: A number of books have been written about or have mentioned the assault. In 1962, Operation Deadstick featured in Darryl Zanuck's film "The Longest Day" which was based on the book of the same title by Cornelius Ryan.