I read Slip along with a reading marathon. 
 Slip is almost the front runner for the best fiction book I've read this year. The characters are great. The science of the future is realistic. The story is believable. It is disturbing, but so possible that it makes you hug your children tighter at night. 
 As there are a bazillion other reviews already, and I don't have any burning complaints about this book at all... I will leave it at that. It's worth the read.