HLG3 on Facebook pointed out to us that NASA’s impressive collection of histories of spaceflight, aeronautics, and a host of other topics is available for free, or at very low cost. You pay the shipping, but the books themselves are often free.
Or, if you’re a cheap bastard like me, most of them are available online in either ebook or HTML format.
Got it, got it, need it, got it, need it…