Claim: Both The Road to Omaha (the sequel to The Road to Gandolfo, which was written earlier on) are comedic thrillers written by Robert Ludlum who used a pseudonym (a ficticious name that a person or group uses for a particular purpose) of Michael Shephard for the first book.
Evidence: It is a sequel to his earlier book The Road to Gandolfo. The Road to Omaha is a novel by Robert Ludlum published in 1992. Both are comedic thrillers concerning Army lawyer Sam Devereaux, who gets caught up in the schemes of General MacKenzie "The Hawk" Hawkins. While the earlier novel was originally published under the pseudonym Michael Shepherd, The Road to Omaha was released under Ludlum's name. A pseudonym (/ˈsuːdənɪm/) or alias (/ˈeɪliəs/) is a fictitious name that a person or group assumes for a particular purpose, which differs from their original or true name (orthonym).