A very unusual concept that is pulled off in a thoroughly believable way. The teenagers are realistic without following many stereotypical tropes (no angst, no love story) which is a welcome breath of fresh air.

Around the middle it lost my attention a bit as nothing much was happening but after a few weeks of only reading a page here and there I got to the good bit around the last quarter of the book and I'm very glad I did. It got me as hooked as I was at the start again! Finishes quite suddenly, scene certainly seems set for a sequel...