The quickest way to use them is just to read them online.  But the interface is not always easy.

Chapters or small sections can be printed or downloaded fairly easily.

Downloading entire eBooks is sometimes possible (though you'll need to set up accounts and download Adobe Digital Editions, Bluefire Reader, or other). The first time you do it, you need some patience

Many of our eBooks allow access by more than one person at a time.