Shift by Jennifer Bradbury

I think the book Shift is a very good book. It is about two friends who go on a cross-country bike trip. One of them,Chris, got a flat tire while they were riding but his friend, Win, didn't stop and kept going. After looking for him for a while, Chris finally gives up and assumes that he probably will see him at home. Chris goes back home and to college, only to find out that Win never did come home. I recommend this book to people who like mysteries and adventure. This book teaches you about the values of friendship and is very enjoyable to read.