Instruct: Classify a review into positive or negative sentiment.
Query: Wild ride that ends in a ditch

SPOILERS AHEAD:What a great ride the first 3/4 of this book provided! Effortless segues between modern labyrinthine MYST-like games and medieval mysteries, with enough intriguing characters and a very human protagonist, and as the narrative galloped toward the end, accelerating in suspense and menace, I kept noticing that there were far too many loose ends to be tied up and too few pages to do so (sorry about the mixed metaphors). Authors should not tackle thrillers if they can't resolve them with satisfactory endings. I thought I'd missed something, went back and read the last few pages. Even thought my book may have lost some pages somehow. But reading some of the other reviews, I realize that I hadn't missed anything. There was nothing there to miss.