One mover will be hardly enough for it if you opt to pack your books in the same box as you pack everything else. The more books the heavier the box, so using a bigger box will hinder your progress. If your collection of books is extensive, make sure to use smaller, high-quality boxes that are solid. Make sure they have not been damaged by moisture or other elements, otherwise, you can lose your books in the middle of the move as they fall through the bottom. Make sure the bottom and top are adequately taped with high-quality packing tape as well.