best-selling hardcover novel in the United States that year, and wrote the introduction to Batman No. 400, an anniversary issue where he expressed his preference for the character over Superman. The Dark Tower books In the late 1970s, King began what became a series of interconnected stories about a lone gunslinger, Roland, who pursues the "Man in Black" in an alternate-reality universe that is a cross between J. R. R. Tolkien's Middle-earth and the American Wild West as depicted by Clint Eastwood and Sergio Leone in their spaghetti Westerns. The first of these stories, The Dark Tower: The Gunslinger, was initially published in five installments by The Magazine of Fantasy & Science Fiction under the editorship of Edward L. Ferman, from 1977 to 1981. The Gunslinger was continued as an eight-book epic series called The Dark Tower, whose books King wrote and published infrequently over four decades (1978-2012). Pseudonyms In the late 1970s and early 1980s, King published a handful of short novels—Rage (1977), The Long Walk (1979), Roadwork (1981), The Running Man (1982) and Thinner (1984)—under the pseudonym Richard Bachman. The idea behind this was to test whether he could replicate his success again and to allay his fears that his popularity was an accident. An alternate explanation was that publishing standards at the time allowed only a single book a year. He picked up the name from the Canadian hard rock band Bachman–Turner Overdrive, of which he is a fan. Richard Bachman was exposed as King's pseudonym by a persistent Washington, D.C. bookstore clerk, Steve Brown, who noticed similarities between the works and later located publisher's records at the Library of Congress that named King as the author of one of Bachman's novels. This led to a press release heralding Bachman's "death"—supposedly from "cancer of the pseudonym". King dedicated his 1989 book The Dark Half, about a pseudonym turning on a writer, to "the deceased Richard Bachman", and in 1996, when the Stephen King novel Desperation was released, the companion novel The Regulators carried the "Bachman" byline. In 2006, during a press conference in London, King declared that he had discovered another Bachman novel, titled Blaze. It was published on June 12, 2007. In fact, the original manuscript had been held at King's Alma mater, the University of Maine in Orono, for many years and had been covered by numerous King experts. King rewrote the original 1973 manuscript