It took me some time to realise Day One by Abigail Dean was named after a particular school day, rather than a countdown of days (like Ruth Ware’s recent release), or referring to the first day AFTER an event.
I didn’t enjoy Dean’s popular debut novel Girl A as much as others, and I wondered if it’d been over-hyped, though I mention in my review that as Dean kept readers guessing for some time, I’d not engaged in the plot as much as I would have liked cos I was kinda confused about what I was reading. Day One similarly keeps secrets from readers, though we most certainly know there are some as Dean foreshadows the events of the present / past and future so – though we know we’re not learning about the events in linear fashion – we kinda know where we end up.