Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Who knew?

I took up mountain biking last summer (1999). It has been a great source of challenge and pleasure to me.Finding this book has made such an adventure out of biking in NJ! It is well-written, has great maps with the mileage and turns and a good rating system so you know what you are getting into before you leave. Driving directions to the spots and explanations of where to park, whether or not there is a fee... it's got everything you need to know. He really did a good job of researching the book and a nice touch is the inclusion of other nearby sites (relevant to the place you pick).One possible improvement: There's a map of NJ showing all the sites, it would be nice if the page numbers were listed there and the trail ratings were also included on the map. As it is now, you need to go to 3 different pages to find all of that info. Hardly worth mentioning, but if there was one thing to make it better, that would be it, in my opinion.