Question: What type of media does The Princess Diaries 2: Royal Engagement and Victory Through Air Power have in common?
Context: Phillip S. Meilinger (born in 1948) is a retired colonel of the USAF as well as a historian and analyst.  He is a member of the Academic Advisory Panel of the Royal Air Force Centre for Air Power Studies.  Before his retirement he was Dean of the School of Advanced Airpower Studies (SAAS) at the USAF's Air University in Montgomery, Alabama.  He received a BS degree from the United States Air Force Academy, an MA degree from the University of Colorado, and obtained a PhD degree in military history from the University of Michigan.  A command pilot, he has served as a C-130 aircraft commander and instructor pilot in both Europe and the Pacific.  After a tour at the Air Force Academy, he was assigned to the Doctrine Division of the Air Staff at the Pentagon.  He has authored four books and scores of articles.  Perhaps best known is his edited work, "The Paths of Heaven: The Evolution of Airpower Theory" (1997).  In an attempt to create debate and more reflection about the inherent characteristics of air power, in 1995 Dr Meiling wrote "Ten Propositions on Airpower", a small and influential booklet advocating what he considers to be the air power equivalent of Principles of War.  Among his many articles is:"Winged Defence: Answering the Critics of Airpower."  "Air Power Review" Vol.  5 No. 4 (Winter 2002), pp. 41–64. The Princess Diaries 2: Royal Engagement is a 2004 American romantic comedy film and the sequel to 2001's "The Princess Diaries".  Unlike the first film, this film is not based on any of the books. "The Princess Diaries" soundtracks are soundtracks of the movies "The Princess Diaries" and "" starring Julie Andrews and Anne Hathaway.  The albums contain songs sung by well-known charting artists as well as performers signed to Disney that the company wanted to promote.  They are released by Walt Disney Records. Ransom My Heart is a romance-novel by Mia Thermopolis with help from Meg Cabot.  It was released in the United States on January 6, 2009, concurrently with the novel "Forever Princess".  The book is, according to the "Princess Diaries" series, written by Mia Thermopolis as her senior project, where she told her friends at first that it was a book about Genovian oil.  It was accepted for publishing during "Forever Princess" the last book in the "Princess Diaries" Series. The Princess Diaries, Volume VII: Party Princess, released in the United Kingdom as The Princess Diaries: Seventh Heaven, is a young adult book in the critically acclaimed "Princess Diaries" series.  Written by Meg Cabot, it was released in 2006 by Harper Collins Publishers and is the seventh novel in the series. The Princess Diaries Volume V: Princess in Pink, released in the United Kingdom as "The Princess Diaries: Give Me Five", is a young adult book in the critically acclaimed "Princess Diaries" series.  Written by Meg Cabot, it was released in 2004 by Harper Collins Publishers and is the fifth book in the series. The Princess Diaries, Volume X: Forever Princess is a young adult book in the "Princess Diaries" series.  Written by Meg Cabot, it was released on January 6, 2009 by Harper Collins Publishers. Victory Through Air Power is a 1943 American Technicolor animated documentary feature film produced by Walt Disney Productions and released by United Artists on July 17, 1943.  It is based on the 1942 book "Victory Through Air Power" by Alexander P. de Seversky.  De Seversky appeared in the film, an unusual departure from the Disney animated feature films of the time. The Princess Diaries, Volume IX: Princess Mia, released in the United Kingdom as "The Princess Diaries: To The Nines", is a young adult book in the critically acclaimed "Princess Diaries" series.  Written by Meg Cabot, it was released in the USA on December 26, 2007 by Harper Collins Publishers and is the ninth novel in the series. The Princess Diaries, Volume XI: Royal Wedding is a book in the "Princess Diaries" series.  Written by Meg Cabot, it was released on June 2, 2015 by William Morrow and is the first adult installment of the series.  The book takes place 8 years after the previous book.
Answer: film