HELTER SKELTER:
THE TRUE STORY OF THE MANSON MURDERS by VINCENT BUGLIOSI with CURT GENTRY 502 pages. Norton. $10.
Is this book really necessary? Thanks to massive publicity, everyone knows all too well that on Aug. 9, 1969, Actress Sharon Tate and four others were savagely murdered in a Los Angeles home leased by Tate and her husband, Director Roman Polanski. Early next morning a well-to-do L.A. couple, Leno and Rosemary LaBianca, were similarly butchered. Because of the prominence of the first victims, plus Polanski's identification with macabre films (Repulsion, Rosemary's Baby), the...