The other side of night : a novel / Adam Hamdy.

Enhanced descriptions from Syndetics:

For fans of Matt Haig and Anthony Horowitz, a " strange, compelling, and ultimately moving head-spinner of a novel" (John Connolly) in which the lives of a disgraced police officer, a prolific author, and an upstanding citizen are inextricably bound together by a series of mysterious deaths.

The Other Side of Night begins with a man named David Asha writing about his biggest regret: his sudden separation from his son, Elliot. In his grief, David tells a story.

Next, we step into the life of Harriet Kealty, a police officer trying to clear her name after a lapse of judgment. She discovers a curious inscription in a secondhand book--a plea: Help me, he's trying to kill me . Who wrote this note? Who is "he"?

This note leads Harri to David Asha, who was last seen stepping off a cliff. Police suspect he couldn't cope after his wife's sudden death. Still, why would this man jump and leave behind his young son? Quickly, Harri's attention zeroes in on a person she knows all too well.

Ben Elmys: once the love of her life. A surrogate father to Elliot Asha and trusted friend to the Ashas.

Ben may also be a murderer.

Compulsively readable and thought-provoking, " The Other Side of Night is one of those rare books that you'll still be thinking about long after the last page" (Jenny Blackhurst, author of How I Lost You ).