Agree with LM on Kindle, L. There are two variations of the basic Kindle:

- Wi-Fi only ($139)

- adds 3G ($189)

The advantage to the 3G is you can purchase books and browse the web when Wi-Fi isn't available.

The larger format Kindle is better for school books and PDFs but I don't know how many textbooks are available at this point. Also, I prefer the small format Kindle because it is easier to hold for extended reading sessions.