This book is definitely dated, and the main character's bratty anti-establishment attitude is so over the top that I can only hope some of today's teens will one day look back on their own self-righteousness with similar embarrassment. There is a huge hullabaloo about the dangers of young people hitchhiking, to the point that's not only illegal, but cops are cracking down on businesses that facilitate people hitching rides there (to be fair: murdered hitchhikers were a growing victim class this decade). This is a short book, so given its title I bet you can guess that she runs into some trouble on the road.
There is also an annoyingly unresolved plot thread -- she spends several chapters traveling with a man who is desperately convinced that she can give him an idea why his own rebellious teen daughter ran away from home years ago; said daughter never contacted him again and neither he nor us readers can even be sure she's still alive. GIVE ME CLOSURE, HOLLAND. As payment for how boring and philosophical some of these conversations are, if nothing else.
However, the puppy she rescues from some abusive boys is very cute, and he both enlivens every scene he's in and elevates this into a book worth reading.