56 Days by Catherine Ryan Howard
The Premise: 56 days ago Clara and Oliver met at a grocery store in Dublin. Things seem to be going well, but there is this thing called COVID-19 happening (heard of it?). After just a couple weeks of dating they learn that the city is going on lockdown. Rather than spending the next few weeks alone in their own apartments, they decide to temporarity move in together. They each have their own reasons for wanting to do this and neither is quite what you assume.
We learn right at the beginning that at the end of this 56 days, Oliver is found dead. It’s all that pesky inbetween stuff that keeps us guessing!
If you like a good suspensfull mystery, give this one a try!