started placing all
of the Lone Wolf books online in a downloable html format in 2002. It includes all of the original artwork, and you just point to a link to jump to the correct page. Check it out if you feel like playing the books again without having to pay for them. Some of the later books are collectors' items, so they can be pricey and hard to obtain.
If you do play them again, one word of advice: Download the "base" download first because it will help organize each of the "books" that you download.