If all goes well, Lovelace will soon be available as a book through Springer-Verlag. I encourage you to buy a copy instead of using this electronic version. The electronic version will continue to be freely available, but I think many people will prefer the paper version. Publication will provide people with a high-quality paper version of Lovelace.
Some material is only available in the book.
Many people find that it's faster and easier to read paper than to read typical computer screens. The paper version will help you save time and avoid eyestrain. Originally Lovelace was small enough to easily read on a computer, but now it's so big that a paper version is significantly faster to read. If you're curious about its size, statistics on Lovelace's size are available . The book has been professionally edited, so the book version has had a number of errors removed.