This is technically a young adult book, I suppose in the vein of Hunger Games or Maze Runner. It's certainly pretty dark with plenty of despair and a bit of death.
In a dystopian version of the UK the children of uncaptured criminals are imprisoned in their stead. Locked into a ‘strap' physically attached to their spine these ‘strutters' pay for a crime they didn't commit. The plot follows 16 year-old Ant and her 11 year-old brother as prisoners riot and the system starts to fall apart.
I liked this book but I didn't love it, it was well written, interesting, good characters with depth and backstories etc. Mayo paints pictures with his words and the premise is terrifyingly believable but it didn't really ‘grab' me at any point. It's also pretty long and although there are some exciting moments I found the ending a bit of a let down.