Geek Trivia: Historically, Valuable Library Books Were Protected With? March 17, 2018 How-To Geek, IFTTT Think you know the answer? Click through to see if you're right! from How-To Geek https://www.howtogeek.com/trivia/historically-valuable-library-books-were-protected-with/ via IFTTT loading... Share this Share on FacebookTweet on TwitterPlus on Google+