This is a book that will haunt me. I don't know that it's one I'd recommend ... very different in its presentation, very dark/disturbing, maybe too realistic/possible, a mother's worst fear. 

I always notice POV and tense in books ... this was a mix of 1st person, 2nd person (the "you" being the husband, this is "her side of the story TO him") and 3rd person. Mostly past tense, but there are a few present tense portions. The beginning (1st/2nd/present tense) isn't even labeled ... it's not a prologue, but it's before chapter 1 ... it ends with "I pick up the thick stack of paper beside me on the passenger seat and feel the weight of my words. I’ve come here to give this to you. This is my side of the story" and then Chapter 1 starts, and we/the reader assume we are now reading that manuscript (the MC WAS a writer in the story, she writes well). 1st/2nd person/past tense. Interspersed among the 85 chapters are some additional, unnumbered, chapters, dated/from the past, featuring the history of the MC's mother/grandmother. 3rd person/past tense. I'm not sure if these were included in the "manuscript" for the husband, or were only for our/the reader's eyes. 

Honestly - I'd started reading this book some years ago. It didn't take. I didn't give it much of a chance. I think the "you" - the speaking to someone (I don't know if I fully realized it was to the husband in the story) just threw me. I've heard a lot of buzz about it though, and picked up a physical copy (for the LFL). I was able to borrow the audio and Kindle copy from the library, and I went primarily with audio. 

Triggers - child death/endangerment. 
ProFanity x24