Let's start with the cool factor, because that's what made me buy this the moment it came out. There's a protagonist with half his brain (the half that enabled empathy, apparently) removed, who makes his living reading other peoples' thoughts and intentions through close observation. Imagine a younger, colder, more focused Sherlock Holmes and then take away the drama queen tendencies, the social skills, and the cozy Victoriana; the part that's left might feel a bit like Siri. There are the intricately damaged altered-brain characters you might expect from Watts if you've read the rifters books. There's the space vampire who out-baddasses every other vampire I've ever encountered in a novel, and I know from vampire books. No gothy romantic hero here -- just a creature who has out-evolved you so thoroughly you can't even get your head around it.
Now let's talk about the ideas. Blindsight takes on the evolutionary benefits of sociopathic behavior, and the ethics of torture, the puzzle of sentience, and what it means to intentionally develop a simulacrum of empathy and conscience (and whether it's worthwhile to do so). These ideas have been explored elsewhere, but I've never seen it done so well. Blindsight isn't *about* aliens or vampires or the future of technology. It's about us: our moral choices, our short cultural attention spans, the mental shortcuts we use so we can function, and what happens when our reach exceeds our evolutionary grasp.
But I must digress, because it probably sounds like I'd describing something dry and obvious and preachy. Didactic fiction drives me up the wall. Heavy-handed exposition and self-important authorial philosophizing will make me drop a book faster than anything but bad dialogue. This book is none of that. Watts packs in so many thought-provoking ideas and so much straight-up SMRT that I'm still blinking, and he does it seamlessly, while keeping everyone in character, and without letting up on the pace at *all*. (I should mention that the book includes something that would, in any other book, be three-page infodump. Watts frames it so skillfully that it serves as an emotional climax instead. I goggle at the skill required to pull this off.)
It's completely engaging from the first page to the last, and it's completely readable. It's not reassuring or fuzzy, but it's not a self-indulgent emo fest either. It's not flawless, but its successes overwhelm its shortcomings. It's very cold, very dark, supersharp, ambitious as hell, intellectually satisfying, and astonishingly light on its feet -- and I stayed up till three am on a worknight to finish it in one eight-hour gulp. If any of that sounds like your thing, buy this book. Maybe if enough of us do so, more publishers will realize that there really is a market for books like this.