Questia Library is a new iPhone App that looks like it will be a great tool in any student’s arsenal. The app gives you access to the Questia research Library which covers subjects in the humanities and social sciences, from History to Philosophy and Art to Economics. But instead of having to spend money on downloading individual ebooks, for just $9.95, you can get access to a collection of 76,000 books and 2.7 million journal, magazine, and newspaper articles with Questia Library, and the catalog is always growing. Combine this app with the AP Stylebook app, and the iPhone is turning into a killer tool for termpaper writing.