Complex sentence: Dewey's caretaker, librarian Vicki Myron, published a book on Dewey's life in 2008, entitled', which became a "New York Times" number one nonfiction bestseller.
Split into simpler sentences: Dewey's caretaker, librarian Vicki Myron, published a book on Dewey's life in 2008, entitled'. It became a "New York Times" number one nonfiction bestseller.