URGENT! energy question please help

[ruby_duby]

I am really stuck on this question. Can anybody help me solve it?

How can you store energy in a book?

PLEASE HELP!!!!!!![*(]

[jamesrc]

Assuming this isn't a riddle, how about by putting it on a shelf? In order to increase the amount of gravitational potential energy an object has (where potential energy U = mgh, and h is measured with respect to "ground," wherever you decide that should be), you need to increase either its mass, g, or h. I suppose you could write in the book to increase its mass or take it to another planet to change g, but I think the easiest thing to do is to pick it up and place it higher, thereby increasing h.