A velvety voice brings good news: the name of a lost Eastern European writer few have heard of, the reappearance of the genius’ brief novel. The voice is joined by a friend, Susan Sontag, who tells the story of finding Leonid Tsypkin’s *Summer in Baden-Baden* in a bargain book bin on Charing Cross Road in London. “It was the prose of ecstasy,” Sontag says, before describing a man approaching her at the Russian Samovar in New York, demanding to know how she knew of Leonid Tsypkin. The man was the person who first snuck the manuscript out of the Soviet Union in 1981. A double miracle. “This is an everyday occurrence,” the velvety voice says. “Finding a great book is part of a life spent looking for great books.” The voice is Michael Silverblatt’s. For 33 years on his weekly syndicated KCRW show, *Bookworm*, Michael Silverblatt, who died on February 14, was the voice of literary rapture.…