Classic Star Wars Vol 1 In Deadly Pursuit
Classic Star Wars Vol 2 The Rebel Storm
Classic Star Wars Vol 3 Escape to Hoth
Each volume covers about 7 of the original stories. You can I suppose get the individual stores as separate books but that would make for a lot of books and shippings costs. These volumes are about 100 pages or so...
They are not completely trivial to get, but you can get used copies at amazon or TFAW.com.