If you like "Helter Skelter" by Vincent Bugliosi...

Thank you for e-mailing the Central Rappahannock Regional Library for a
book match. You asked for a match of Vincent Bugliosi's Helter
Skelter. Here's a list of books you may like based on aspects of Helter

How about another true crime book penned by Vincent Bugliosi, this time
in conjunction with Bruce B. Henderson:

And the Sea Will Tell by Vincent Bugliosi and Bruce B. Henderson
As he did in Helter Skelter..., Bugliosi draws readers into the
psyches of the criminally inclined in this minutely detailed chronicle
of two couples on a remote Pacific island. To Mac and Muff Graham,
Palmyra is Paradise; for Jennifer Jenkins and Buck Walker, it is a good
deal less. Tension builds between the couples, and when the Grahams are
reported missing, everyone except Bugliosi believes Jenkins and Walker
are responsible. Convinced of their innocence, he takes on the
unfamiliar role of defense lawyer, using his knowledge of the law and
keen insight into human behavior to reveal what really happened to the
Grahams. Not as grisly as Helter Skelter , this tale is just as
riveting--proving once again that the best stories come right out of
newspaper headlines. (Library Journal)

Or, how about other true crime, such as:

Zodiac by Robert Graysmith
Horrifying in a way no fiction can be, Zodiac is the gripping story
of the serial murderer who terrorized the San Francisco bay area from
1966 to 1978. The book contains reproductions of the killer's
communiques to the police as well as the author's own chilling
speculations on Zodiac's true identity--and his whereabouts today.
(Catalog summary)

The Stranger Beside Me: Ted Bundy: The Shocking Inside Story by Ann
Ted Bundy was everyone's picture of a natural "winner" -- handsome,
charming, brilliant in law school, successful with women, on the
verge of a dazzling career. On January 24, 1989, Ted Bundy was executed
for the murders of three young women; he had also confessed to taking
the lives of at least thirty-five more young women from coast to coast.
This is his story written by a woman who thought she knew Ted Bundy --
until she began to pull all the evidence together, and the whole
terrifying picture emerged from the dark. (Catalog summary)

Ann Rule has many other true crime works from which you may choose.

Less contemporary, but still riveting true crime:

The Maul and the Pear Tree: The Ratcliffe Highway Murders, 1811 by T.A.
Critchley and P.D. James
In 1811, London's East End was the scene of a series of murders so
brutal and irrational that they caused panic throughout the city,
which lacked a central police force. This engrossing account,
marking the American nonfiction debut of British mystery novelist
James, details the seven vicious (``brains battered out and throats
butchered''), apparently motiveless slayings (which occurred first in a
linen shop, then, days later, in a nearby pub); the confused efforts of
local ``police'' groups; and the cases' suspiciously abrupt closing
after suspect John Williams, a seaman and lodger at the Pear Tree public
house, committed suicide in jail, thereby sealing his ``guilt'' and
prompting a bizarre parade of his corpse (together with a murderous
maul) throughout the city. James and police historian Critchley use
documents and contemporary news accounts splendidly, pointing up the
incompetence of the investigators and offering an intriguing view of
what really happened. First published in Britain in 1971, this will
certainly please James's following here. (Publishers Weekly)

If you liked the cult and charismatic leader aspects of the Manson
story, you may like:

Seductive Poison: A Jonestown Survivor's Story of Life and Death in the
Peoples Temple by Deborah Layton
A former high-level member of the Peoples Temple--the Jim Jones-led
group that made headlines with a mass suicide in Guyana in 1978--tells
the riveting story of how she was seduced by one of the most notorious
cults in recent memory. (Catalog summary)

You may also like books by John Douglas, a criminal profiling expert.
One of his is:

The Cases That Haunt Us: From Jack the Ripper to JonBenet Ramsey, the
FBI's Legendary Mindhunter Sheds New Light on the Mysteries that Won't
Go Away by John Douglas and Mark Olshaker

Lastly, perhaps you would like a fictional account of true crime.
Here's a great one:

In Cold Blood: A True Account of a Multiple Murder and Its Consequences
by Truman Capote
With the publication of this book, Capote permanently ripped through
the barrier separating crime reportage from serious literature. As he
reconstructs the 1959 murder of a Kansas farm family and the
investigation that led to the capture, trial, and execution of the
killers, Capote generates suspense and empathy. (Catalog summary)

I hope you will find something in these suggestions that you like. Your
inquiry also mentioned, along with the book match for Helter Skelter,
the genre "Inspirational." Since Helter Skelter is pretty darn far from
the same type of book as an inspirational one, I've ignored that here.
If you do indeed want suggestions for inspirational works also, let us

Michele R. Brown
Reference Librarian