It would probably be better to stick to something 8th edition or above. It doesn’t need to be brand new, but the 4th would be missing enough material to mess you up. DM me for a pdf of the 11th if you want. If you have any other questions post to this thread: http://talk.collegeconfidential.com/high-school-life/1997342-usabo-2017-2018-p5.html