Any suggestions on great books?

i want to do some summer reading and i need some book suggestions before i go to the library. I AM NOT into vampires werwolfs and depressed people in storys. i love harry potter, and mysterys and love storys. I enjoy reading Nicolas Sparks books. i am a teenager but tend to get bored in some of the childish books for our age. any mild adult book is okay. please any suggestions would be super!!!!!!!!!! =D