If you’ve longed to own a copy of the appendix for the federal budget (all 1,416 pages for fiscal 2011), you’re in luck. You can snag a copy for just $9 .99 on Google’s ebookstore. The search engine giant is partnering with the Government Printing Office to offer federal government titles in its collection of ebooks, which include biographies and memoirs. GPO has added nearly 100 government titles in the catalog “and will continue to add titles in the next several months,” according to a GPO announcement made Tuesday. For now, you can read up about the space age or the history of Walter Reed Army Medical…