Instruct: Classify a review into positive or negative sentiment.
Query: Great book, a little too long

This is a great book and was very enjoyable to read, a real page-turner like a good Clancy or King book that you can't put down. However, at around page 500, I just wanted this book to be over. I really wanted to find out how the story ends and find out what happened to the characters, otherwise I probably would have stopped reading the book (which I'm glad I did), but in the middle of the book it seemed more like the quest for the Holy Grail than a book.The details in the book are amazing, Stephenson's sure done his research. Most sci-fi books are lite on true facts, just throwing in mumbo-jumbo to make it sound techie, but this book has the technical details right!