This book could have had some good ideas and turned them into something interesting to read. Instead it mashed together a bunch of concepts, not fully fleshed out, and produced some drivel. It's full of tortured metaphors (even in the title Alien "Clay", except there's nothing special about the soil or earth of this planet - it's the ecology and the lifeforms which are talked about). The first third of the book is brutality (it's a convict prison planet), the second third is horror (OMG the weird way that life happens on this planet - genuinely a bit squickful), and then the last third is a hurried, unearned conclusion where humans start to coexist with the life on the planet. It's written in an engaging manner so I can imagine people would be drawn in by it, but the more I read, the more I grew to hate it. I don't know how this got nominated for a Hugo and I'm annoyed that this author has two nominations and I have to read another book by him. Don't read this book.