I received a free e-copy of this book from the publishers via NetGalley in exchange for an honest review.

Chris is about to enact on his plan to kill himself to join his dead wife when his well-thought out plan is interrupted by Sarah. When Sarah stumbles across Chris on the edge of a train platform, she can't walk away and forget about him, and instead enters his life and begins an intense relationship. However, there's a mystery about the death of Chris's wife and a shadowy figure that appears to be shadowing everything he does. Is Chris who he says he is, and is Sarah safe with him?

Our Little Secret is a rather intense, fast-paced thriller that I was able to read in one day. I really enjoyed the slow reveals about Chris and his wife, and how what appeared to have happened to her wasn't at all what the reader would at first assume. His mind really begins to unravel throughout the book and it's definitely a journey trying to decide whether the reader can trust him or not.

Sarah was, to be honest, a little bit of a wet blanket and a bit surface level throughout the novel. A lot of her personality development appeared to be her penchant for loving abusive and terrible men, and we didn't get a lot into her background as to why this may be and why she is so unhappy with her life apart from the shambles of her love life. I liked the weird relationship she had with Chris, though at times the way she described their sex life could be troubling.

I will say, this book does need to be come with a trigger warning for those suffering with their mental health and who may be battling suicidal thoughts. Chris really gets into the way he planned to kill himself by jumping in front of the train, and those scenes are intense, descriptive and a bit troubling.

Ultimately Chris doesn't get the help he obviously desperately needs throughout the novel, and nothing is ever really delved into regarding his mind - was it a Dissociative Identity Disorder or something else? I would have liked to have known more but honestly, I think the author took the easy way out by having Chris jump in the end. I also didn't really like that for Chris it seemingly ended up being a peaceful death when jumping in front or under a train seems like one of the most traumatic, painful ways of dying.