Anxious People by Fredrik Backman
A bank robbery. A hostage drama. A stairwell full of police officers on their way to storm an apartment. It was easy to get to this point, much easier than you might think. All it took was one single really bad idea.
“Dad? The phone that we sent in for the perpetrator, where did we find it when we came in?” Jack suddenly asks.
“It was there on that little table,” Jim says.
“That explains it,” Jack sighs.
“We’ve been thinking about this wrong all along.”