In 2012, Neil Gaiman appeared at Comic-Con via Skype to announce that he was collaborating with artist JH Williams III (Promethea) on The Sandman: Overture. It's hard to imagine the level of excitement this prequel instigated. A quarter-century ago, Sandman changed the comic book ecosphere — many called it the gateway comic. Norman Mailer called it "a comic strip for intellectuals." It was the first graphic novel to hit The New York Times Best Seller List. Gaiman ended the series with issue No. 75. But he was still in love, and so were we. There was so much left untold — hints in Season of Mists about Morpheus's adventures, clues in Brief Lives. In October 2013, the first issue arrived, dripping with a few family secrets about the Endless. Installment two is upon us. To celebrate, original artwork from both issues will be on display, as part of the "Grains of Sand: 25 Years of the Sandman" exhibit, with Williams on hand to share his experience (and a few spoilers) prior to the book signing.