Here are my five...not including my Kindle (which is NOT cheating, I don't care what you say)!
This one tells the story of Edmond Dantes, a sailor of humble beginnings, who is engaged to marry the love of his life, Mercedes. On the eve of the wedding, Edmond is betrayed, arrested, and thrown in the terrifying Chateau D'If. The book chronicles Edmond's imprisonment, eventual escape, and the revenge he takes on the men who betrayed him.
Betrayal, romance, revenge, buried treasure...it's all in here. This is the kind of book that you will stay up all night to read because you just can't put it down.
If, for some unknown reason, you haven't read one (or all) of these books, take my advice and read them now. They are well worth the investment of time!