Books like Helter Skelter
Vincent Bugliosi, Curt Gentry
Helter Skelter is 676 pages, about 12 hours 24 minutes at 250 words a minute.
12 books to read next
How long each takes
Chaos 9.7 h 
Zodiac 6.5 h 
LAbyrinth 6.2 h 
Severed 4.4 h 
By Their Father's Hand 5.2 h 
Blood Brothers 7.2 h 
Until the Twelfth of Never 11.6 h 
The Family 7.6 h 
Ghettoside 7.0 h 
Manson in His Own Words 4.3 h 
Blood Brother 4.1 h 
Poisoned Love 8.8 h Bar height shows length. Estimated at 250 words a minute.