Win awesome Batman statues and graphic novels Book Depository

Believe it or not, Batman is 75 years old this month. To celebrate the Dark Knight's birthday as well as his eternal youth we have a fantastic competition for you.
Just answer the simple question below to be in with a chance to win these 10 classic Batman graphic novels and two limited edition statues that will make everyone, including us, green with envy.
Competition ends on Monday 28 July noon BST. Good luck!