I'm using preview to read pdf's now and it works great for smaller ones but I have a 1199 page textbook in PDF format that bogs Preview down. Is there another option that I can try that can handle larger files better?
Because every Mac ships with Preview and Adobe provides Adobe Reader as freeware, there is not a lot of demand for other free options. If it ain't happening for the OP with Preview, then Adobe Reader is his best alternative.