My first thoughts on this book were it took too long to get interesting, I was confused at first as to what this story was trying to say, and it was hard in the beginning to follow the two periods of time. Anyway it was toward the middle of book the events were getting clearer to understand.
Heather did a wonderful job lying out what the characters were about, doing, and the descriptions of things actually put you in the book.
I can understand why Wylie Lark changed her name. At the end it all comes together and you go "Ah I see now. She's been through a lot"
There are these three mysteries going on different times but linked together. I try not to try to figure it out. When I do I spoil the story for myself. Although the one I did figure it out. Now come on who doesn't question a person, Randy of why is he in the barn of people he hated? After answering that he wanted to help, please all of a sudden he wanted to help the people he hates? There was more to Randy as we see at the end of the story.
There are a lot of characters in this story to keep up with. A vibe of Agatha Christie going on there. She had a lot of characters in her books too. It gives the reader more to sink their teeth into of who dunit.
Scary that this takes place in a blizzard. Which I would never just go out to see where a sound was coming from, or someone out there that shouldn't be. I was frustrated with Josie because of that. For a true crime writer she was naive. Although Josie was a fighter. She wouldn't give up. Even for a friend that was still alive.
Some of things I do highlight that I saw worthy to connect me with the story more.
I give The Overnight Guest 4 
I though it confusing in beginning. I have another book of Heather Gudenkauf's and look forward to reading it.
