In the end , Sly defeats Clockwerk , the leader of the gang who killed his father and stole the book .
Sly and his friends , Bentley and Murray , then set out on a journey to collect all of the stolen pages of the book .
Sly defeats Clockwerk , the leader of the gang who killed Sly 's father and stole book book .
Sly and his friends , Bentley and Murray , then set out on a journey to collect all of the stolen pages of the book .