I'm sure most everyone knows we have a free Kindle app for our ipads. It works like a Kindle, including getting the books wirelessly without the use of iTunes.
Also realize that there are many free books, and not just out of copywrite classics. Often Amazon has free books as promotions, as does iBooks. For example at this time [ame=http://www.amazon.com/Executive-Privilege-Bonus-Material-ebook/dp/B003IEJZYW/ref=pd_sim_kinc_3?ie=UTF8&m=AG56TWVU5XWC2]Amazon.com: Executive Privilege Free with Bonus Material eBook: Phillip Margolin: Kindle Store[/ame] is free. Always look at the "customers also bought" section because more often than not that will lead you to more free books.
All the major ebook stores always have some fresh free books. Amazon, Kobo, iBooks have easy to get and use apps for our ipads. It would be easy (depending on your reading taste of course) to get an iPad and never have to buy a book again.
There are lots of good deals, just shop around!