Question: On which novel is the 1965 film with a character Agent Zeke Kelso based?

full_context: Document 1: Cat Ballou: Cat Ballou is a 1965 comedy Western musical film starring Jane Fonda and Lee Marvin, who won an Academy Award for Best Actor for his dual role. The story involves a woman who hires a notorious gunman to protect her father's ranch, and later to avenge his murder, but finds that the gunman is not what she expected. The supporting cast features Michael Callan, Dwayne Hickman, and singers Nat King Cole and Stubby Kaye, who together perform the movie's theme song.
Document 2: Herbie Rides Again: Herbie Rides Again is a 1974 American comedy film and a sequel to "The Love Bug," released six years earlier, and the second in a series of films made by Walt Disney Productions starring an anthropomorphic (and quite autonomous) 1963 Volkswagen racing Beetle named Herbie. The movie starred Helen Hayes, Stefanie Powers, Ken Berry, and Keenan Wynn reprising his villainous role as Alonzo Hawk (originated in the films "The Absent-Minded Professor" and "Son of Flubber").
Document 3: Disney's Animated Storybook: 101 Dalmatians: Disney's Animated Storybook: 101 Dalmatians is the sixth entry in the "Disney's Animated Storybook" point-and-click adventure interactive storybook PC game series, based on theatrical and home video releases. This game was based on the Disney franchise of "One Hundred and One Dalmatians", which began with the 1961 film of the same name. Like that movie, the plot of the game sees villain and fashionista Cruella de Vil steal a series of dalmatian puppies from married couple Roger and Anita and their pets Pongo and Perdita, who then attempt to rescue them back. The game was developed by Media Station and published by Disney Interactive. It was released on March 18, 1997. The game is the only "Animated Storybook" title based on a Walt Disney Animation Studios film that was made before the Disney Renaissance (ignoring the two "Winnie the Pooh"-based titles).
Document 4: The Million Dollar Duck: The Million Dollar Duck (also titled as The $1,000,000 Duck) is a 1971 American comedy film produced by Walt Disney Productions about a goose that lays golden eggs scenario. It was directed by Vincent McEveety, and stars Dean Jones, Sandy Duncan and Joe Flynn.
Document 5: Dean Jones (actor): Dean Carroll Jones (January 25, 1931 – September 1, 2015) was an American actor best known for his roles as Agent Zeke Kelso in "That Darn Cat!" (1965), Jim Douglas in "The Love Bug" (1968), Albert Dooley in "The Million Dollar Duck" (1971; for which he received a Golden Globe nomination) and Dr. Herman Varnick in "Beethoven" (1992).
Document 6: Jeffrey Jones: Jeffrey Duncan Jones (born September 28, 1946) is an American actor best known for his roles as Edward R. Rooney in "Ferris Bueller's Day Off" (1986), Charles Deetz in "Beetlejuice" (1988), Skip Tyler in "The Hunt for Red October" (1990) and A.W. Merrick in "Deadwood" (2004–2006). His career started in Guthrie Theater in Minneapolis, Minnesota, advanced to London and Broadway, before leading to a series of character acting roles in film and television, which often capitalized on Jones's deadpan delivery of characters in unusual situations to comic effect. Jones was nominated for a Golden Globe Award for his portrayal of Joseph II in "Amadeus" (1984) and a Screen Actors Guild Award as part of the ensemble cast of "Deadwood".
Document 7: That Darn Cat (1997 film): That Darn Cat is a 1997 American mystery comedy film starring Christina Ricci and Doug E. Doug. It is a remake of the 1965 film "That Darn Cat!", which in turn was based on the book "Undercover Cat" by Gordon and Mildred Gordon. It is directed by British TV veteran Bob Spiers (most famous for "Fawlty Towers", as well as "Spice World") and written by Scott Alexander and Larry Karaszewski, best known for "Ed Wood" and the first two "Problem Child" films.
Document 8: Jimmy Dean: Jimmy Ray Dean (August 10, 1928 – June 13, 2010) was an American country music singer, television host, actor, and businessman, best known today as the creator of the Jimmy Dean sausage brand. He became a national television personality starting on CBS in 1957. He rose to fame for his 1961 country crossover hit "Big Bad John" and his 1963 ABC television series, "The Jimmy Dean Show", which also gave puppeteer Jim Henson his first national media exposure. His acting career included a supporting role as Willard Whyte in the James Bond movie, "Diamonds Are Forever" (1971). He lived near Richmond, Virginia, and was nominated for the Country Music Hall of Fame in 2010, although he was formally inducted posthumously.
Document 9: The Shaggy D.A.: The Shaggy D.A. is a 1976 American comedy film and a sequel to "The Shaggy Dog" (1959) produced by Walt Disney Productions. It was directed by Robert Stevenson and written by Don Tait, based on the original film and inspired by the long out-of-print Felix Salten novel, "The Hound of Florence."
Document 10: Dean Jones (actor): Dean Carroll Jones (January 25, 1931 – September 1, 2015) was an American actor best known for his roles as Agent Zeke Kelso in "That Darn Cat!" (1965), Jim Douglas in "The Love Bug" (1968), Albert Dooley in "The Million Dollar Duck" (1971; for which he received a Golden Globe nomination) and Dr. Herman Varnick in "Beethoven" (1992).
Document 11: Undercover Cat: Undercover Cat is a novel by Gordon and Mildred Gordon, about a cat who assists the FBI in tracking down a pair of bank robbers. It was published in 1963.
Document 12: That Darn Cat!: That Darn Cat! is a 1965 American Walt Disney Productions thriller comedy film starring Hayley Mills (in her last of the six films she made for the Walt Disney Studios) and Dean Jones (starring in his first film for Disney) in a story about bank robbers, a kidnapping and a mischievous cat. The film was based on the 1963 novel "Undercover Cat" by Gordon and Mildred Gordon and was directed by Robert Stevenson. The title song was written by the Sherman Brothers and sung by Bobby Darin. The 1997 remake includes a cameo appearance by Dean Jones.
Document 13: James Earl Jones: James Earl Jones (born January 17, 1931) is an American actor. His career has spanned more than 60 years, and he has been described as "one of America's most distinguished and versatile" actors and "one of the greatest actors in American history." Since his Broadway debut in 1957, Jones has won many awards, including a Tony Award and Golden Globe Award for his role in "The Great White Hope". Jones has won three Emmy Awards, including two in the same year in 1991, and he also earned an Academy Award nomination for Best Actor in a Leading Role in the film version of "The Great White Hope". He is also known for his voice roles as Darth Vader in the "Star Wars" film series and Mufasa in Disney's "The Lion King", as well as many other film, stage and television roles.
Document 14: Kentucky Jones: Kentucky Jones is a half-hour comedy/drama starring Dennis Weaver as Kenneth Yarborough "K.Y. or Kentucky" Jones, D.V.M., a recently widowed former horse trainer and active horse farm owner, who becomes the guardian of Dwight Eisenhower "Ike" Wong, a 10-year-old Chinese orphan, played by Ricky Der. Harry Morgan, previously of the CBS sitcoms "December Bride" and "Pete and Gladys", was featured in the series as Seldom Jackson, a former jockey who assists Dr. Jones. Cherylene Lee appears as Annie Ng, Ike's friend. Arthur Wong portrays Mr. Ng, Annie's father. Keye Luke (1904-1991) stars as Mr. Wong, a friend of Dr. Jones. Nancy Rennick (1932-2006) appears as Miss Throncroft, a social worker. "Kentucky Jones", which ran on NBC from September 19, 1964, to September 11, 1965, was the first of four television series starring Weaver after he left the role of the marshall's helper Chester Goode on CBS's western classic "Gunsmoke".
Document 15: The Aristocats: The Aristocats is a 1970 American animated romantic musical comedy film produced by Walt Disney Productions and released by Buena Vista Distribution. The 20th Disney animated feature film, the film is based on a story by Tom McGowan and Tom Rowe, and revolves around a family of aristocratic cats, and how an alley cat acquaintance helps them after a butler has kidnapped them to gain his mistress's fortune which was intended to go to them. The film features the voices of Eva Gabor, Hermione Baddeley, Phil Harris, Dean Clark, Sterling Holloway, Scatman Crothers, and Roddy Maude-Roxby.
ground_truth: Undercover Cat