Untouchable is not a happy read.
Maya is the happiest girl alive as she goes to work. She's absolutely distraught by the time she goes to bed as her boyfriend, Jamie, has committed suicide. She has no idea why as she thought they were happy. But we find out Jamie's story and he had the most hideous childhood.
The first part of the book swaps chapters with Maya's now and Jamie's past. Maya's story is one of getting over bereavement and loss. Jamie's story is the tale of his horrendous abuse in an orphanage. The abuse is alluded to, not spelled out, but it's so sad what he and his friends had to go through. Later on the story is about Maya trying to find out just what happened.
With books like this it seems wrong to say "I enjoyed it", but the storytelling was addictive to read. I liked the way the story unfolded and the shocks that were given.