Question: What Gordon and Mildred Gordon novel was made into a movie in which a character named Agent Zeke Kelso was portrayed?

Context articles: Down Three Dark Streets
Zeke Kinski
That Darn Cat!
Undercover Cat
Mildred Gordon (politician)
Mildred Gordon (biologist)
Experiment in Terror
Mildred Gordon (Ganas)
That Darn Cat (1997 film)
Dean Jones (actor)

Down Three Dark Streets is a 1954 documentary-style film, starring Broderick Crawford and directed by Arnold Laven.
 The screenplay was written by Gordon and Mildred Gordon, based on their novel "Case File FBI".
Ezekiel "Zeke" Kinski is a fictional character from the Australian soap opera "Neighbours", played by Matthew Werkmeister.
 He made his first on-screen appearance on 22 August 2005.
 Zeke is the son of Alex Kinski and the younger brother of Katya and Rachel.
 His storylines have included the death of his father, being trapped in the warehouse collapse, developing an anxiety disorder, joining Pirate Net and forming many romantic relationships.
 In October 2010, it was announced that Werkmeister and his character were to leave "Neighbours".
 Zeke made his final appearance on 11 March 2011.
 In February 2014, it was announced that Werkmeister would be returning to "Neighbours" for a brief guest stint and Zeke returned on 7 April 2014.
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.
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.
Mildred Gordon (née Fellerman; 24 August 1923 – 8 April 2016) was a British Labour politician.
Mildred Gordon (1920–93) was an American microbiologist noted for her seminal research of human sperm and the endometrium, and of the uterus.
Experiment in Terror is a 1962 suspense-thriller released by Columbia Pictures.
 It was directed by Blake Edwards and written by Mildred Gordon and Gordon Gordon based on their 1961 novel "Operation Terror".
 The film stars Glenn Ford, Lee Remick, Stefanie Powers, and Ross Martin.
Mildred Gordon (born 1922 - January 4, 2015) was the founder and Executive Director of the Foundation for Feedback Learning (FFL) and co-founder of the Ganas intentional community.
 She was the Communications Director of ActivistSolutions.org.
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.
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).