I believe it is still the best account of the Tate-Labianca murders. Bugliosi was the D.A. assigned to the case and shares not only many insider tips and stories but provides an amazing background on the Manson Family and Charlie himself. I am still amazed at how close the Tate Murders came never to be solved for a sundry of reason.
If you are curious (especially the youngings) about this piece of American Murder History, give the book a chance. It is great summer reading