That was Then, This is Now

I recently finished That was Then, This is Now by SE Hinton. This book is a story about a 15 year old guy named Bryon and his best friend/adopted brother Mark. Since they were little Bryon and Mark have been super close but when Bryon starts to grow up and spend more time with his girlfriend Cathy the two start to grow apart. When Cathy's brother, nicknamed M&M runs away to a commune, or a group of people living together who share responsibilities and processions they try to find him. Bryon catches Mark dealing drugs and calls the cops so Mark is very mad at Bryon because Bryon got him in trouble and he already had a criminal record. I do not want to give away too much, like what happens to M&M because I think that people should read this book themselves, but if they do decide to they should first read the first book in the Series called The Outsiders.