Lately, I have started reading the Nutrition section but I mistakenly bought ACSM's Resource Manual for Guidelines for Exercise Testing and Prescription, Sixth Edition instead of ACSM's Guidelines for Exercise Testing and Prescription Eighth Edition. If I would like to return it then shipping will just kill me (I live in Karachi) so can I still work my way through without ACSM's Guidelines for Exercise Testing and Prescription Eighth Edition. Please advise! Thanks, Amin G.