I'm currently taking a course on European Nationalism in the 19th Century history and I have had a very hard time finding decent additional sources to read about. Most of the books recommended by people, such as the German History, 1770-1866 by James Sheehan from the /r/AskHistorians book list are only available in print. I live in Hong Kong and most of these books aren't available here, unless I order them internationally. Are there any good sources for Germanic Nationalism that any of you would've known of that are currently available to buy as an electronic version?
Fordham University has the Internet History Sourcebook, which offers quite a few primary sources that deal with nineteenth-century Germany, nationalism, romanticism, and other crucial aspects of the period. It includes primary sources on many topics from the early modern period to the present. I hope this helps.
According to worldcat, the book is available at the libraries of Hong Kong Baptist University and Hong Kong University of Science and Technology. Maybe you can read it there?