After reading all that young adult fiction, I figured it was time for a grown-up book. Light by M. John Harrison is very grown-up. It's a science-fiction novel set simultaneously in the present and 400 years in future, and rather more full of sex and violence than I was expecting. But really, the thing about this book is how dense it is, how full of language. I had to read many paragraphs a few times, not to make sure I understood them, but rather to make sure I had gotten all the juice out of it.