Complex sentence: Due to Hollandersky's very limited writing ability, his autobiography was given serious assistance by former New York columnist C. L. Edson, and had previous ghostwriters attempt to assist with the publication with less success.
Split into simpler sentences: Due to Hollandersky's very limited writing ability, his autobiography was given serious assistance by former New York columnist C. L. Edson. The book had had previous ghostwriters attempt to assist with the publication with less success.