The Strand Bookstore, which opened on Fourth Avenue in 1927, now takes up 55,000 square feet on Broadway and 12th and has '18 miles of New, Used, Rare and Out of Print Books' in stock. The novelist David Markson, who was born in Albany in 1927 and died in his West Village apartment last month, spent more than a few of his intervening hours at the Strand. (Here's a short clip of him speaking there.) Still, it was a shock to walk into the Strand last week and find the contents of his personal library scattered among the stacks.