What Poirot books is japp in?

Inspector John Japp, a policeman with Scotland Yard, who works with Poirot is in these four novels and 56 stories.

--The Murder on the Links (Poirot’s Second Case)—Novel

Murder in the Calais Coach(short story)

The Market Basing Mystery(short story)

The Disappearance of Mr. Davenheim -novel