Effectively Billy is a clone, a William to be precise and one of many. When an accident stops him from being slurried, he takes the place of his replacement clone and starts to be an individual.
The ideas of individuality and freedom are very interesting, however it is completely undercut by terrible world building. Why did they clone Williams? There is a passage in the book that tries to explain that its a corporate ploy to make money, but make money for whom? Is there more to the world? How did this happen and really do I care?
I think I would have cared up until the point the William 'female' clone entered the story. Yep apparently clones of yourself can be female and happy to jump into the sack with you after some banter. This bit is explained but I switched off my kindle for a bit at that.
'Billy' is a decent character but his narrative was a little wearing at times. And as the other characters were basically the same person, I couldn't tell if they were interesting or not.
It is an intriguing read but not amazing.