Question: What is the name of this fictional supervillain appearing in American comic books published by DC Comics that Clark Kent fights in New York in the novel "It's Superman!?"

full_context: Document 1: Jonathan Samuel Kent: Jonathan Samuel "Jon" Kent is a fictional superhero appearing in American comic books published by DC Comics. Created by Dan Jurgens, the character first appeared in "Convergence: Superman" #2 (July 2015). He is the son of Superman/Clark Kent and Lois Lane and is the latest character in the DC Universe to assume the Superboy persona.
Document 2: Lois &amp; Clark: The New Adventures of Superman: Lois & Clark: The New Adventures of Superman (commonly known simply as Lois and Clark and in the UK as The New Adventures of Superman) is an American television series based on the DC Comics character Superman created by Jerry Siegel and Joe Shuster. It stars Dean Cain as Clark Kent/Superman and Teri Hatcher as Lois Lane. The series aired on ABC from September 12, 1993 to June 14, 1997. The show was shot entirely in California.
Document 3: Superman and Lois Lane: Superman/Clark Kent and Lois Lane are among the best known fictional couples. Created by writer Jerry Siegel and artist Joe Shuster, both characters (including Superman's alter ego, Clark Kent) first appeared in DC Comics' "Action Comics" #1 (June 1938). They have remained in a complicated relationship ever since. The couple has been portrayed in multiple Superman adaptations in different media.
Document 4: Superman: The Wedding Album: Superman: The Wedding Album is an American comic book published in 1996 by DC Comics. It is notable in that it features the long-awaited wedding of Superman/Clark Kent and Lois Lane in DC Comics continuity, an event that was nearly 60 years in the making. Bearing a cover date of December 1996, the issue was published during the week of October 6, 1996, coinciding with an episode of the television series "" which also featured the wedding of the two characters. The story was written by the five principal writers for the "Superman" titles at the time: Dan Jurgens, Karl Kesel, David Michelinie, Louise Simonson, and Roger Stern.
Document 5: Lex Luthor in other media: Lex Luthor is a fictional supervillain appearing in American comic books published by DC Comics. As Superman's archenemy, he has been portrayed in almost every Superman media franchise and adaptation.
Document 6: Lex Luthor: Alexander Joseph "Lex" Luthor is a fictional supervillain appearing in American comic books published by DC Comics, though on occasions he has established himself as an antihero. He was created by Jerry Siegel and Joe Shuster. Lex Luthor first appeared in "Action Comics" #23 (April 1940) and has since endured as the archenemy of Superman.
Document 7: Superman in film: The fictional character Superman, an American comic book superhero in DC Comics publications, has appeared in movies almost since his inception. He debuted in cinemas in a series of animated shorts beginning in 1941, and then starred in two movie serials in 1948 and 1950. An independent studio, Lippert Pictures, released the first Superman feature film, "Superman and the Mole Men", starring George Reeves, in 1951.
Document 8: Superman: Grounded: "Grounded" is a 2010-2011 comic book story arc that ran through the "Superman" monthly ongoing series. It was written by J. Michael Straczynski and Chris Roberson, and penciled by Eddy Barrows, with covers by John Cassaday.
Document 9: Superman (Earth-Two): Superman of Earth-Two is an alternate version of the fictional superhero Superman, who appears in American comic books published by DC Comics. The character was introduced after DC Comics created Earth-Two, a parallel world that was retroactively established as the home of characters whose adventures had been published in the Golden Age of comic books. This allowed creators to publish Superman comic books taking place in current continuity while being able to disregard Golden Age stories, solving an incongruity, as Superman had been published as a single ongoing incarnation since inception. The character first appeared in "Justice League of America" vol. 1 #73 (August 1969).
Document 10: General Zod: General Dru-Zod is a fictional supervillain appearing in American comic books published by DC Comics, commonly in association with Superman. The character, who first appeared in "Adventure Comics" #283 (April 1961), was created by Robert Bernstein and initially designed by George Papp. As a Kryptonian, he exhibits the same powers and abilities as Superman and is consequently viewed as one of his greatest enemies.
Document 11: Lois Lane: Lois Lane is a fictional character appearing in American comic books published by DC Comics. Created by writer Jerry Siegel and artist Joe Shuster, she first appeared in "Action Comics" #1 (June 1938). Lois is a reporter for the Metropolis newspaper, the "Daily Planet", an award-winning journalist and the primary love interest of the superhero Superman.
Document 12: Lionel Luthor: Lionel Luthor is a fictional character portrayed by John Glover in the television series "Smallville". The character was initially a recurring guest in season one, and became a series regular in season two and continued until being written out of the show in season seven. The character returned to the show in season ten again as a recurring guest role as a parallel universe (Earth-2) version of the character. In "Smallville", Lionel Luthor is the father of Lex Luthor (Michael Rosenbaum), and founder and CEO of LuthorCorp. Lex Luthor's father was first introduced in "Superman" comics by Jerry Siegel in 1961 and has since appeared in other Superman-related media under different names. "Smallville" is the first appearance in which the character has been an intricate part of a Superman adaptation. Series developers Alfred Gough and Miles Millar created Lionel Luthor for "Smallville" to provide an antithesis to the parenting style of Jonathan Kent (John Schneider) and Martha Kent (Annette O'Toole).
Document 13: It's Superman!: It's Superman! is a novel by Tom De Haven based on the comic book superhero Superman. It was released on September 15, 2005 in hardcover and August 29, 2006 in paperback. The premise tells the tale of Clark Kent's beginnings into becoming Superman, set in the 1930s, where Clark befriends a wrongly convicted photographer named Willi Berg, and is then taken from Kansas to Hollywood and finally in New York where he meets Lois Lane, fights Lex Luthor, as he debuts in his superhero persona. Despite the setting, this is not about the Golden Age Superman also known as the Superman of Earth-2; as Perry White, the Daily Planet, Lex Luthor's position and his trademark powers (including flight) are not part of that alternate Earth. Rather, it's a Superman period piece set in the 1930s.
Document 14: Superman: Superman is a fictional superhero appearing in American comic books published by DC Comics. The character was created by writer Jerry Siegel and artist Joe Shuster, high school students living in Cleveland, Ohio, in 1933. They sold Superman to Detective Comics, the future DC Comics, in 1938. Superman debuted in "Action Comics" #1 (cover-dated June 1938) and subsequently appeared in various radio serials, newspaper strips, television programs, films, and video games. With this success, Superman helped to create the superhero archetype and establish its primacy within the American comic book. The character is also referred to by such epithets as the Big Blue Boy Scout, the Man of Steel, the Man of Tomorrow, and the Last Son of Krypton.
Document 15: Joe Shuster: Joseph "Joe" Shuster ( ; July 10, 1914 – July 30, 1992) was a Canadian-American comic book artist best known for co-creating the DC Comics character Superman, with writer Jerry Siegel, in "Action Comics" #1 (cover-dated June 1938).
ground_truth: Lex Luthor