Perks of Being a Wallflower by Stephen Chbosky!!! Changed my life, seriously.
Also, Harry Potter series, sixth being the best.
Mortal Instrument series by Cassandra Clare (fourth one coming out soon! i'm so exicited *eeeek*). Jace is one of my most favorite fictional characters of all time. I'm reading Infernal Devices series right now.
Pridge & Prejudice is a good one too. Not big on romance novels, but I love it.
Many other amazing books, but these make the top of the top list.
I love reading and have read many different books over the years. Jane Austen as I stated previously is one of my favorites but Stephen King, Dean Koontz, John Grisham etc. have written awesome books too. It is hard to pick just one book or author.
Oh my, there are so many! Ordinary People by Judith Guest and She's Come Undone by Wally Lamb are two of my very favorites. Really love Steve Berry currently and have been reading some Andy McDermott too.