Scandal at the Fledermaus (German:Skandal um die Fledermaus) is a 1936 German comedy film directed by Herbert Selpin and starring Viktor de Kowa, Maria Andergast and Adele Sandrock.
An Ideal Husband (German:Ein idealer Gatte) is a 1935 German comedy film directed by Herbert Selpin and starring Brigitte Helm, Sybille Schmitz and Karl Ludwig Diehl.
 It is based on the 1895 play "An Ideal Husband" by Oscar Wilde a sensitive and romantic comedy representing the 19th century.
 The adaptation is very faithful to the original work.
Water for Canitoga (German: Wasser für Canitoga) is a 1939 German western film directed by Herbert Selpin and starring Hans Albers, Charlotte Susa and Josef Sieber.
 The film is a "Northern", set in Canada in 1905 where an engineer is working to construct a new water supply system despite repeated attempts at sabotage.
 It is based on a play by Hans Rehfisch, Otto Eis and Egon Eis.
The Marriage Swindler (German:Heiratsschwindler) is a 1938 German drama film directed by Herbert Selpin and starring Eduard von Winterstein, Viktoria von Ballasko and Kurt Waitzmann.
 It is sometimes known by the alternative title Die rote Mütze (The Red Cap).
 A confidence trickster is released from prison and travels to a village where he blackmails and tricks women out of their savings, before eventually being caught.
Ransom Riggs (born February 3, 1979) is an American writer and filmmaker best known for the book "Miss Peregrine's Home for Peculiar Children".
Geheimakte W.B.1 is a 1942 German drama film directed by Herbert Selpin and starring Alexander Golling, Eva Immermann and Richard Häussler.
 The film portrays Wilhelm Bauer and his work on developing the submarine.
 It was based on the novel "Der Eiserne Seehund" by Hans Arthur Thies.
The Green Domino (French: "Le Domino vert" ) is a 1935 French/German drama film directed by Henri Decoin and Herbert Selpin, based on play by Erich Ebermayer.
 It tells the story of a rich heiress who falls in love with an art critic after his wife has been murdered.
 It was released on DVD in France on 5 April 2007.
Sergeant Berry is a 1938 German comedy western film directed by Herbert Selpin and starring Hans Albers, Toni von Bukovics and Peter Voß.
 A tough Chicago policeman is sent to the Mexican–American border on a dangerous mission.
 It was based on a novel by Robert Arden.
Herbert Selpin (29 May 1904 – 1 August 1942) was a German film director and screenwriter of light entertainment during the 1930s and 1940s.
 He is best known for his final film, the partly suppressed "Titanic", during the production of which he was arrested by Propaganda Minister Joseph Goebbels.
 He was later found dead in his prison cell.
Alarm in Peking is a 1937 German adventure film directed by Herbert Selpin and starring Gustav Fröhlich, Leny Marenbach and Peter Voß.
 It is set against the backdrop of the 1900 Boxer Rebellion in China.
 German filmmakers had frequently used China as a setting since the 1910s, but from 1931 onwards they made a series of films with political overtones.

Question: Did Ransom Riggs and Herbert Selpin both work in the film industry ?
Answer: yes