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Afraid of the Dark: The True Story of a Reckless Husband, His Stunning Wife, and the Murder That Shattered a Family

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Detroit mortgage broker Mark Unger adored his wife Florence and their two young sons. But after a decade of marriage and increasing financial trouble, Mark's life began to slowly unravel. He became addicted to pain killers and gambling, and ended up spending five months in rehab.Forced to go back to work, Flo became bitter and resentful of Mark and began to have an affair with one of his friends. When Mark returned home and his disability checks weren't enough to make ends meet, Flo filed for divorce.Panicked by the thought losing her, Mark did everything he could to win Flo back. Even though she resisted his efforts, Flo did agree to a weekend getaway at the family's favorite lakeside resort. But after their first night there, Flo went missing ... and the next day her corpse was found floating in the water. Mark claimed that her death was an accident-one that must have happened while he was up at the cottage putting the kids to sleep. But soon a jury would be convinced of what Flo's friends and family believed to be true: that Flo would never have been alone on the boat dock that night because she was deathly afraid of the dark.

1 pages, MP3 CD

First published January 1, 2009

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Tom Henderson

24 books36 followers

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5 stars
76 (20%)
4 stars
99 (26%)
3 stars
128 (33%)
2 stars
57 (15%)
1 star
17 (4%)
Displaying 1 - 30 of 30 reviews
1 review2 followers
July 4, 2012
I made myself finish this book solely because of the setting. This true story happened about 15 miles from my house and I knew exact location, and the lead detective on the case. Without this local interest, I didn't feel like this was a book I would have read.
Profile Image for Shannon.
13 reviews1 follower
April 12, 2020
I like true crime books, and I still liked the story, but the writing got a little repetitive. Repeating the same information as much as 3 different times thought the book.
Profile Image for Annie Booker.
509 reviews5 followers
June 15, 2021
A very intriguing case and a well written book about it.
Profile Image for Roger.
65 reviews1 follower
March 19, 2020
Contrary to other reviews that I have read about this book, I found this book to be one of, if not the most interesting books I have read. About half or at least one-third of the latter part of the book was devoted to the trial......and much narrative by and between opposing counsel(s) and expert testimony. A very intriguing argument as to the extent of culpability on the part of the accused (Mark Unger). I was highly shocked, as well as was one of the prosecutors (Donna Pendergast) that the jury returned a verdict of First Degree murder as opposed to Murder in the second degree. I do not, for one minute, believe that Unger premeditated the murder of his wife, Floence. I am totally convinced he acted in a sudden burst of rage when pushing or shoving his wife against a deck railing which resulted in her falling 12 feet which ultimately lead to her death. The “culpability” issue arises after the fact.
Profile Image for Jessica.
413 reviews7 followers
March 8, 2017
I have to say that this wasn't the best writing that I have read for true crime books but it wasn't horrible.
Profile Image for Amy.
399 reviews5 followers
September 12, 2018
I read a lot of true crime but it was hard to get into the book. I noticed lots of spelling and grammar issues which was distracting. It dragged on a bit.
59 reviews2 followers
January 6, 2019
I only read 3/4 of book, it jumped around too much. Total waste of my time.
Profile Image for Heather Varvel.
3 reviews
February 12, 2021
I liked this book.. but it is very repetitive. That was annoying. I could almost guess what they would say next.. I don’t need them to continually repeat.. just get to the point. We know how people interact and, ‘he said’ ‘she said’ etc but seriously.. I remember those same details from last chapter. No need to recap them over and over again.
Profile Image for Nicole Bonfante.
52 reviews11 followers
February 15, 2021
I’m not sure why I kept reading this book. I think I was hoping it would get better. I got it for free with my Kindle membership and I love true crime, so the description was enticing. The book ended up being so slow and repetitive that I feel like I really only needed the first few chapters and the last chapter. Kinda bummed I spent so many hours on it!
Profile Image for ErikaShmerika Wine.
738 reviews53 followers
August 30, 2021
This was an interesting case. Not so much for the crime itself, but for the trial. I’m a big fan of true crime books that feature interesting or case-making aspects to it- something a little more than ‘rejected man throws murdery tantrum’ -and this fits the bill. I’m pretty sure Unger is responsible for the death of his wife, but if I’d been on the jury, I doubt I’d be able to convict.
Profile Image for Raymond Angana.
106 reviews
July 2, 2023
Read by mistake, first half was interesting then took a sudden turn to being dull and boring.

The fact that Flo is afraid of the dark saved the case, was not played as a story in the book, rather it was narrated blandly.
5 reviews
January 16, 2025
I didn't care for this book. The story telling was ok, I just couldn't stand Mark and how he was portrayed. He bothered me so much, it made it difficult to continue reading about him and getting through this book.
Profile Image for Tija Addams.
52 reviews1 follower
February 2, 2019
I really enjoyed this one. I wanted to jump through the book and throat punch the husband Mark!! The level of his evil and selfishness is staggering
Profile Image for Cindy B. .
3,899 reviews219 followers
January 23, 2023
Strangely woven tale - worse because it’s real. Some profanity. Unsatisfying end is helped by an excellent narrator.
Profile Image for Rae Dobko.
28 reviews1 follower
May 11, 2023
I have watched a couple documentries on this.....I do prefer the documentries! Book seemed quite back and forth at times.
Profile Image for Kerri Robinson.
2 reviews
May 25, 2025
Ugh!!!

If I didn't live here I would not have finished this book. Too much back ground on things that had nothing to do with the trial.
Profile Image for Michael Stetz.
142 reviews1 follower
October 31, 2025
Switched to the audible version after reading two chapters. Defiantly better audible book. Dragged at the end. Just wanted it to be over.
5 reviews
October 29, 2011
A story out of the Detroit News that I had followed & knew pretty much the plot but It was still an interesting read because it was near home and I enjoy True Crime Genre. Bill Peedle
Profile Image for Rob Connor.
214 reviews
May 26, 2015
not the best written book - but the subject matter is fascinating. a legal tour of Michigan (especially nw Mich) in the 2000s that surrounds this famous case
Displaying 1 - 30 of 30 reviews

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