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FREE BOOK GIVEAWAY 1/n — I'll be doing a few of these thru the release of #TrickyLogicPuzzles on @amazon! This one's easy: I'll pick a random account that retweets this post by 11:59pm Central Feb 9. (Make sure I can DM you to get an address!) Info at clontz.org/blog/2020/01/17/book/
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(US addresses only, sorry!)