I also finally read John Green's Fault in our Stars. This is an amazing book. John Green's prose is always just enjoyable to read. I am not really into the whole realistic fiction kid dying of cancer story, but because of the more sophisticated level that John Green brings to his characters the story is thoroughly enchanting.
I finished Perks of Being a Wallflower. I completely understand why it is a frequently challenged book in libraries. It is a good story, and will relate to many readers, but it is in my opinion very depressing. Again, it will relate to what many people feel like they go through in high school though, and it is a good coming of age story for the modern reader.