A print book of any sort is precious by any measure. I have technical books from as far back as my teen years (~1966-68) that are all kept in secure(?) storage in the house. The only ones in the shop are those related to current projects. Plus a few that came out of the 'company' truck when I sold it and haven't gotten around to storing away.
I probably am over-protective of my books. But after watching libraries dumping books by the truckload simply because they haven't been 'checked out' for a year or two, and the people that tend them can't read. I hesitate to call them 'librarians' any more. . . I keep literally 4 libraries at my residence, 'carpentry and cabinet work', 'computer and electronics'. 'machines and machining', and 'fiction and other literature'. I have 2 partial sets of 'The Harvard Classics' from 1914 and 1915 that I combined to make one complete set. And gave away the duplicates, rare for me. And a 'First Edition' of Samual Clemens (Mark Twain), another by the author of 'Little Women', and many that are no longer available even on eBay. I keep watching but so far have only found one that I wanted in 20 odd years. I have never counted how many are here, but any time I get an idea I search for books on the subject. Many times it gets reduced to 'internet' searches, but that is usually a last resort.
I will say that anytime I compare an old technical book and something printed within the last 50 years, the old version always has nore useful information, although it usually is harder reading. I'm getting wound up in 'preach' mode, sorry. I'll go now. . .
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