Complex sentence: Danny Dunn is the name of a fictional character and protagonist of a series of American juvenile science fiction/adventure books written by Raymond Abrashkin and Jay Williams between 1956 and 1977.
Split into simpler sentences: Danny Dunn is the name of a fictional character and protagonist of a series of American juvenile science fiction/adventure books. Co-authors Raymond Abrashkin and Jay Williams wrote these books between 1956 and 1977.