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3.93  ·  Rating details ·  951 ratings  ·  81 reviews
"Phelps is the Harlan Coben of real-life thrillers."--Allison Brennan

Sheila Davalloo was young, attractive, and successful. When she started a new job at a cutting-edge research lab in Stamford, Connecticut, she met the man of her dreams. Nelson Sessler had no idea how violently Sheila would react when he began seeing a co-worker, Anna Lisa Raymundo. Sheila eliminated her
Paperback, 512 pages
Published March 4th 2014 by Pinnacle (first published January 1st 2014)
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Average rating 3.93  · 
Rating details
 ·  951 ratings  ·  81 reviews

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♥ Marlene♥
Jun 23, 2016 rated it really liked it
What a crazy story this was. This was one of the better books by this author. I wish he would stop constantly adding his judgement in his books. He can't help but it. Here an example.

"Hoping she could win this man back. This my friends is the description of a desperate woman who will go to any lengths to get her man"

I cannot enjoy his books because of him constantly having to have his say and telling us what to think and feel, thinking we the readers are so dumb we won't get it without him forc
Apr 27, 2014 rated it really liked it
As a reader if true crime, I've read many of the very prolific crime writer Phelps' books. I think his prose is clumsy and amateurish, but the cases he writes draw me to his books anyway. This one is a doozy, detailing the case of a Big Pharma love triangle in which total wackadoo Sheila falls madly in love with her some-time lover and complete d-bag Nelson, eventually leading Sheila to kill his sweet girlfriend Anna Lisa. The book really picks up in the middle section, when all the fascinating ...more
Dana ****Reads Alot****
Aug 31, 2014 rated it it was amazing
I don't even know where to begin. Sheila was in a love triangle. With Nelson who seemed be a sleaze bag in my opinion. He was already hooked up with Anna Lisa. Sheila became infatuated with Nelson. They all seemed to work in the same building, but the Anna knew nothing of crazy Sheila. To bad she didn't , it may have saved her life. Nelson was becoming more interested in Anna as he was seing Sheila's Loopy side. Sheila was married to Paul Christos. Every night she would come home and tell her hu ...more
Ange H
Oct 19, 2020 rated it did not like it  ·  review of another edition
I didn't realize I had seen this case on Dateline or one of those true crime shows, and it was fascinating.

This book, however, was a mess. The writing was objectively terrible and amateurish. I almost wonder if Amazon accidentally released the author's raw, unedited notes. That's the only thing that explains for me how this was published.
Leigh Podgorski
Still Wrong Photos & Poorly Written

I wonder who cares less about their readers-- Kindle or Mr Phelps? If you sift down through the reviews you will see many that say the photos are wrong, that Kindle was advised, and promised they would be updated. Ah, no. In addition, the commentary by Mr Phelps is childish and unprofessional, but worse is his writing. I wish I had jotted down some of the myriad examples but his analogies are clunky and ham-fisted, and the book at times weighted with tedium--es
Cherie Beauton
Dec 14, 2014 rated it did not like it
Horribly written. Disorganized, and for unknown reasons, it contains extraneous information. Chapter ten starts with an unrelated murder of a child, then never refers to it again. I seriously want my money back.
Stella Gonzales
Mar 22, 2014 rated it it was amazing  ·  review of another edition
Couldn't put book down

I was a big fan of Ann Rule because of her talent in writing her books but now I will be read Mr Phelps's books.
I recommend this book to anyone interested in true crime.
Amy Sheehan
May 09, 2014 rated it did not like it
This book was boring!! And very repetitive
Feb 17, 2015 rated it it was amazing  ·  review of another edition
Great book

Love the author, great read!! I read a lot of M. William Phelps, he is a great writer. I will continue to read his books.
Denise Wallace
Jul 16, 2017 rated it it was amazing  ·  review of another edition
A masterful profile of a true psychopath
Sep 15, 2020 rated it really liked it
Phelps is a true crime genius. I love the way he writes and he’s so analytical in detailing the background of the crimes and the criminal profiles. I always come out feeling like I’ve read a great novel when I read one of Phelps’ books.
Mar 05, 2014 rated it really liked it
Shelves: true-life-crime
Another great read from Mr. Phelps. There are many synonyms for obsessive......all-consuming, controlling, fanatic, neurotic and so forth but the one that comes to the forefront when reading about Sheila Davalloo is pathological. Somehow she thought she could get the man she was obsessed with (he was no prize but to each their own) by eliminating the competition, in this case a beautiful woman named Anna Lisa. She then attempted to eliminate her naive, head-in-the-sand husband Paul. It was this ...more
Apr 04, 2018 rated it did not like it
I usually won’t review a book that I don’t finish. However, this was such a terrible read that I feel like I have to. I’m sure that this is a fascinating and terrifying case and I really do wish that I could have read the story behind it. This was overly repetitive and had no organization. Phelps seems incapable of reporting the facts impartially and instead constantly includes his opinion. Phelps also makes it clear that he doesn’t think his audience is very intelligent when explaining common s ...more
Jun 07, 2016 rated it liked it
Love the cover. This story stretched 500 pages out, so there's a lot of additional material--even the lives of the cops and investigators. I was DONE at the halfway point, since we already knew who did what, just as soon as the cops found the culprit. I wasn't about to continue after that. I'd say there's about 300 extra pages of fluff here. ...more
Aug 16, 2017 rated it it was amazing
Ann Rule was my favorite true-crime author. Sadly, she has passed away. I am happy to report that I now have another favorite, M. William Phelps, who writes true crime just as well and as detailed as Ann Rule did. "Obesessed" was a great page-turner, and I can't wait to read more from this author. ...more
Apr 05, 2014 rated it it was amazing  ·  review of another edition


This book was well written as all of his books have been. This woman was a true psychopath and was lucky she wasn't caught a lot sooner than she was. I really love this author and the details he provides in his books.
Mar 06, 2018 rated it it was amazing
This case was always one that gripped me from the first time I heard it until I read the book. The book went into a lot more detail than any Dateline or 48 Hours show ever did. I really enjoyed all the extra information.
Tammy Lynn Beatrice Doyle
Aug 11, 2013 rated it it was amazing
utterly amazing ... as Phelps' always is! ...more
Ronnie Cramer
Sep 02, 2014 rated it liked it
M. William Phelps is usually reliable, but he seemed to resort to cliches a lot here and laid on the pro-police/prosecution rhetoric a little thick. An interesting case though!
Feb 18, 2015 rated it it was amazing
Well written and researched true crime, I was surprised I had not heard of it.
Dec 26, 2019 rated it liked it
Full rating (2.75)

I didn't enjoy M. William Phelps writing style. The way he would stop in the middle of a scene to jump to some other aspect of the story he felt needed elaboration before returning was annoying. That he continued to hop around the timeline of this story in a nonlinear and arbitrary fashion also detracted from this book for me. The worst aspect of all in my opinion was his lack of focus and pacing. He'd over elaborate on an aspect of this case for far too long only to return to
Anne Howard
Feb 24, 2019 rated it really liked it
A fast-paced read for true crime readers who can't get enough of creepy love triangles. Sheila Davalloo takes the title for "Love-Obsessed Psychopath of the Century", with Glenn Close's character in Fatal Attraction running a close second. A few reviews state that this book is poorly written. While it does have some of those worn out true crime cliches that the writers of Dateline and Snapped are so fond of using, Phelps' narrative voice is consistently unique and personable. It feels like you a ...more
Karen Jones
Aug 19, 2018 rated it it was ok
Obsessed is the perfect title for this book. I've come across people who are obsessed with somebody, but they aren't consumed by it like Sheila was. I would've liked this more if there was a full background of her, though, not just tidbits here and there. What was the deal with her brother? He was so important to Sheila but yet a shadowy figure that never had a voice.
I never got to know Anna Lisa or Nelson either. That was something Ann Rule was great at and which I miss.
The trial took up the l
Heather Moss
I liked this one a lot. I tend to prefer true crime books about female psychopaths and serial liars, especially when the story involves a love triangle. This one did not disappoint.

The only thing that irked me was that the author mentions how much prettier the victim was than the murderer. What does it matter? I looked at the photos, and I disagree. I think Sheila was rather pretty, as was Anna Lisa. But clearly the only thing that matters is that Sheila was sick on the inside, and Anna sounds
Savanah Rae
Jul 04, 2017 rated it it was amazing
This review has been hidden because it contains spoilers. To view it, click here.
Suzanne Lopes
Jan 15, 2021 rated it it was amazing
Great Read. Sheila Davalloo was a cold blooded narcissistic murderer. According to the book she did not have a bad childhood for her to have become a murderer. She killed a beautiful woman and tried to kill her husband which by the way was a good man that put up with her. I don’t believe she was mentally sick. She knew was she was doing. She went through great lengths to keep a man that NEVER wanted her to begin with. A definite must read..
Aug 13, 2019 rated it liked it
This was the first true crime novel i was reading and it was quite good. Actually, the initial chapters were quite interesting, but as the story progressed i felt the same thing was being repeated again and again.
Stacey OBrien
Nov 21, 2020 rated it it was amazing  ·  review of another edition
Great flow, amazing story

What a story! I had never heard of this case. For me, it's also a morality tale about the dangers of messing around with people who mess around. It's just not worth it!
Leslie Jonsson
Aug 05, 2017 rated it liked it
A choppy writing style and a lack of coherent storyline makes this a difficult tale to follow. However, the tale, if you stick with it; of Sheila Devalloo is fascinating-she is a true psychopath.
Diane Waddington
Apr 10, 2018 rated it it was amazing
This review has been hidden because it contains spoilers. To view it, click here.
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Crime, murder and serial killer expert, creator/producer/writer and former host of the Investigation Discovery series DARK MINDS, acclaimed, award-winning investigative journalist M. William Phelps is the New York Times best-selling author of 30 books and winner of the 2013 Excellence in (Investigative) Journalism Award and the 2008 New England Book Festival Award. A highly sought-after pundit, Ph ...more

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