Generation ships to the stars, rigid caste system that isn't so rigid, a main character who isn't compelling, and an adversary (can't call him villian) who we just don't care about. This stuff has been done to death, and in this case there is nothing new. I thought there would be some interesting plot turns when the opportunity arose, but alas, no.Ms. Matthews seemed content to write an average book with no real "bite" to it. There is simply nothing here to hold a readers attention. The science is straightforward, and the people seem to be wooden. The characters are in an essentially life or death situation, and yet they are reduced to rearranging deck chairs on the Titanic. Average or slightly below. A true ho-hum of a book.Sorry, not worth any real effort.