Title: Odds On
Content:  Crichton wrote the book in 1965 while a student at Harvard Medical School. He sent it to Doubleday for consideration under the name "John Lange". A reader at Doubleday loved the book but thought it was "too saucy" for that company, so sent it on to a friend at New American Library. Crichton used the name John Lange because at this stage he planned to be a doctor and did not want his patients worried he would use them for his plots. The name came from a fairy tale writer called Andrew Lang; Crichton added an "e" and substituted his own real first name, John, for Andrew.
Title: Ken Grimwood
Content:  Grimwood used the pseudonym Alan Cochran for his novel Two Plus Two (Doubleday, 1980). The storyline follows two Los Angeles detectives investigating a trio of murders that they learn involve members of a swingers club.
Title: The Paper Chase (Symons novel)
Content:  The Paper Chase is a 1956 mystery crime novel by the British writer Julian Symons. It was published in America the following year by Harper under the alternative title of Bogue's Fortune. It was reviewed by fellow writers Milward Kennedy in The Guardian and Philip John Stead in the Times Literary Supplement.
Title: These Names Make Clues
Content:  These Names Make Clues is a 1937 detective novel by E.C.R. Lorac, the pen name of the British writer Edith Caroline Rivett. It was the twelfth entry in her long-running series featuring Chief Inspector MacDonald of Scotland Yard. It was written shortly after Lorac had been elected as a member of the Detection Club, and was likely influenced by her experiences there. Originally published by Collins Crime Club, it was reissued in 2021 by the British Library Publishing as part of a group of crime novels from the Golden Age of Detective Fiction.
Title: Michael Crichton
Content:  came from fairy tale writer Andrew Lang. Crichton added an "e" to the surname and substituted his own real first name, John, for Andrew. The novel was successful enough to lead to a series of John Lange novels. Film rights were sold in 1969, but no movie resulted. The second Lange novel, Scratch One (1967), relates the story of Roger Carr, a handsome, charming, privileged man who practices law, more as a means to support his playboy lifestyle than a career. Carr is sent to Nice, France, where he has notable political connections, but is mistaken for an assassin and finds his life in jeopardy. Crichton wrote the book while traveling through Europe on a travel fellowship. He visited the Cannes Film Festival and 
Title: The Stars' Tennis Balls
Content:  Caderousse || Rufus Cade || translation: rousse = red = Rufus ; Baron Danglars || Barson-Garland || anagram ; Monte Cristo || Simon Cotter || anagram ; Albert de Morcerf || Albert Fendeman || homonym ; } Monte Cristo || Simon Cotter || anagram ; Albert de Morcerf || Albert Fendeman || homonym ; } Albert de Morcerf || Albert Fendeman || homonym ; } In the novel's afterword, Fry states he tried to make his novel appear more of a conscious homage by changing the characters' names to anagrams or references to Dumas' original work: ! Monte Cristo ! Stars' Tennis Balls ! Notes
Title: Pen name
Content:  A pseudonym may be used to protect the writer of exposé books about espionage or crime. Former SAS soldier Steven Billy Mitchell used the pseudonym Andy McNab for his book about a failed SAS mission titled Bravo Two Zero. The name Ibn Warraq ("son of a papermaker") has been used by dissident Muslim authors. Author Brian O'Nolan used the pen names Flann O'Brien and Myles na gCopaleen for his novels and journalistic writing from the 1940s to the 1960s because Irish civil servants were not allowed at that time to publish works under their own names. The identity of the enigmatic twentieth-century novelist B. Traven has never been conclusively revealed, despite thorough research. A multiple-use name or anonymity pseudonym is a pseudonym open for anyone to use and these have been adopted by various groups, often as a protest against the cult of individual creators. In Italy, two anonymous groups of writers have gained some popularity with the collective names of Luther Blissett and Wu Ming.
Title: The Burning City
Content:  other names are anagrams as well: Pothefit / top thief, Resalet / stealer, Dargramnet / grandmater, Seshmarl / harmless, Wulltid / dullwit, Tarnisos / arsonist. Forigaft is an anagram for graffito. And the name of the Toronexti betrays their main profession, which is extortion. According to the afterword published with the book, Larry Niven originally developed the story in order to channel his feelings of frustration relating to the 1992 Los Angeles riots. In keeping with the spirit of the allegory Niven and Pournelle drop into the text several anagrams and other oblique references that bring to mind modern people, places and events. Some examples: 
Title: John Wyndham
Content:  After leaving school, Wyndham tried several careers, including farming, law, commercial art and advertising; however, he mostly relied on an allowance from his family to survive. He eventually turned to writing for money in 1925. In 1927 he published a detective novel, The Curse of the Burdens, as by John B. Harris, and by 1931 he was selling short stories and serial fiction to American science fiction magazines. His debut short story, "Worlds to Barter", appeared under the pen name John B. Harris in 1931. Subsequent stories were credited to 'John Beynon Harris until mid-1935, when he began to use the pen name John Beynon. Three novels as by Beynon were published in 1935/36, two of them works of science fiction, the other a detective story. He also used the 
Title: Donald Henderson (writer)
Content:  From early youth he had written novels and plays under various pseudonyms. He first used his own name on the 1943 psychological thriller Mr Bowling Buys a Newspaper, which got considerable critical attention in wartime Britain. In 1946, it was dramatised for the stage under the same title with a cast headed by Anthony Hawtery and Jean Forbes-Robertson. In 1948, film actor Gene Raymond obtained the screen rights to it, according to the New York Daily News. In 1950, Anthony Hawtrey and Vida Hope starred in teleplay of the novel on British television. In the immediate aftermath of World War II Henderson published a second novel in the same genre, the 1946 Goodbye to Murder. Following the success of Mr Bowling, his book ‘The Announcers’ (written in the pen-name D.H.Landels) with the new title ‘A Voice Like Velvet’ was published by Collins Crime Club.

Question: who wrote catch 22 (both names)?
Answer: Joseph Heller.
American author Joseph Heller.
Joseph Heller.