If your books are all suppose to be the same height, and are tightly in the shelf, you could make a big, rectangle box, and then just worry about the face pointing outwards.
Or, if the books are different heights and stuff, you could still make a big rectangle box, and then scultp it using the cutting tool.
Or.....if no one is suppose to get too close to it, you could make a plane and texture it with a pic of books. But that only works if the Avies can't get too close to it.
But if you want detail, realizm, and people will get close to it.....sorry, but it would look better if you made each book!

Hey! It's good practice! Repetative things always make you better at them! Try making some railings or a long, winding stair case!
(all though I saw on another thread that they have something to help with that!)