Ignition: An Informal History of Liquid Rocket Propellants (1972) [pdf]
This was a favorite book of mine as a child. It was one of the last books that I scanned and uploaded to sciencemadness.org. That's probably for the best, since I was still learning how to make good scans and PDFs with the early books.When I first started scanning and uploading books, Google Books did not yet exist. The HathiTrust did not yet exist. Project Gutenberg and Distributed Proofreaders did exist, but their focus on perfect text transcription of non-technical writing did not really suit the books that I wanted to share.I stopped scanning books because the world largely caught up and surpassed what I could do. Between HathiTrust, Library Genesis, and sci-hub, there has never been a better time for doing deep-dive reading from the comfort of one's own living room. But I'm proud that so many people have enjoyed my scan of this book over the years.