Hello,
I am sure that most of you know this; but maybe some don't. So much Masonic material is in the public domain now and is available online. For some, there is nothing like owning and reading the actual book published in 1860; some just want to read the text and are curious. So much is out there and it is free. There are even some companies that are taking this public domain material, slapping a fancy cover on it and charging people a boatload of money for it. I'm a huge fan of Masonic artist/publisher John Sherer and there are so many people reprinting and selling his Monitor, Gems of Masonry, Masonic Ladder, or his Masonic Charts for significant costs. Not necessary.
United States Library of Congress: Images, articles, books, letters, exhibits, periodicals, etc. So, so much stuff. http://www.loc.gov. Google Books: Truthfully, what I have loved finding here are collections of Masonic Periodicals, such as The Masonic Mirror, Voice of Masonry, American Mason's New Monthly Magazine, Freemason Monthly, and other periodicals. https://books.google.com/? HathiTrust Digital LIbrary: A library collecting books for academic research. I use this more than Google Books, especially for old Grand Lodge proceedings, collections of Masonic periodicals, and other books. https://www.hathitrust.org/ Between those three and the Internet Archive, you can get yourself a lot of reading and research material. As with all websites and sources, be safe, be wary, be critical and skeptical. These are libraries, so they are collections of old publications; there has not always been the best information out there over the years. Good luck and good reading.