Buy all 4 and save $15!! When I first started reading them I was a bit overwhelmed, but like a bible, I kept going back and rereading and now I've read all 4 several times. Great bit of reading if you love archery. Check your local library too, they have the first two in the Bloomington, Indiana public library. If they don't have them there, you could request them and save yourself a bunch of $$. I'd go with Horsefeathers though if you decide to buy them. They are affiliated w/ Primitive Archer Magazine. Happy reading, dpgratz