The princess bride part 3

This book I guess is man vs man and the characters that are involved are the man in black also his real name is Westley. The prince is also involved to find the princess and the princess named Buttercups  ho was robed by the three robbers the giant  the Spaniard and the Turk. The main characters are Westley and Buttercups. Now I found out that Westley was the Dread Pirate Roberts, and that he has been nearly killed every day because of the Dread Pirate Roberts.