Asus Backpack

I'm in college and I have an Asus N70, which is 17.3 "
The laptop came with a shoulder bag, but I hate it, because I can not carry my business school.
Is there a backpack that is made to increase the size of my laptop?

Explore this bag
http://www.laptop-carryingcases.com/prod ...

It fits laptops up to 17.1 "and still has separate compartments for books.

Owning a asus n70 is not bad idea

Targus branded backpacks laptop sizes of laptops with padded attachment, mine is 15 and a half-inch laptop, books etc. but still quite heavy, they are both on shoulder bags as well. You can get cheaper brands, but not the same quality.