You will need a
BlackBerry data plan to get maps. And a media card to store the files you want like e-books. You should be able to read .pdf files with
Documents To Go Premium ($30), and the BB will natively open *some* .pdf files. The Docs To Go Premium is on sale now and is your best solution. You need the Premium Edition to get the .pdf reader. You can get an 8GB memory card for about $15 from Amazon.com, or a 4GB one for about $5. That will handle a bunch of .pdf files without the need to convert them to a smaller format.