Book cover protection

[mattiesmat]

Hello,
I have a weird question and I am not sure where to post.
My question is serious however and I thought this was the best place.

I am reading HOH2 atm and I read it mostly in the bus to school.
Because I take it with me the cover gets more and more damaged (especially the corners).
Have you guys got any advice so the book will 'stay' in good shape?
I would like to be able to see the cover itself.
I want serious replies please.