Question: Helter Skelter is a true crime book, released in which year, by Curt Gentry and Vincent Bugliosi, an American attorney and "New York Times" bestselling author?
Sentence (from "Vincent Bugliosi"): Vincent T. Bugliosi, Jr. ( ; August 18, 1934 – June 6, 2015) was an American attorney and "New York Times" bestselling author.
Relevant evidence: Yes