I vividly remember watching Bowling for Columbine in Psychology in school, and going down a rabbit-hole of researching how it happened and how accurate the film was. Of course the UK gets violence, but generally speaking (and certainly at the time I saw the film), it's more likely to be knife crime rather than guns, so as a naive teenager, this was the first time I'd come across anything like it. In the years since then, I've read a few fictional books about school shootings and One Breath Away is fairly middle-of-the-road in terms of my feelings.

Is it gripping? Of course. It would be difficult to make what is essentially a locked-door thriller anything else.
Did it keep me guessing? Yeah, mostly. There were twists I didn't see coming, and I liked trying to figure out who the perpetrator was alongside the characters.

The problem, I found, was that there were just too many implausible moments. From the school being 'too big to search' to allowing an eyewitness to wait until the next day because she's tired, it means the characters come across as inept and stupid. Obviously, you still want them to identify and stop the perpetrator, but it feels like everything that happens happens more in spite of them than because of them! That pulled me out of the story and meant it lost some of the overall impact and potential.

All in all, an addictive read with some emotional moments, but it will probably make you want to scream at the characters.