The phrase [varför frågade de inte Evans](javascript:void(0)) ("Why Didn't They Ask Evans?") is the title of a detective novel by Agatha Christie, first published in 1934. The story revolves around a dying man whose cryptic last words are the title phrase, which triggers the main characters, Bobby Jones and Lady Frances Derwent, to investigate the mystery. They ask why no one sought out Evans, who is a key person in uncovering the truth behind the murder and the conspiracy around it. The question "why didn't they ask Evans?" refers to the central enigma in the novel: Evans is the person who presumably could have answered crucial questions about the crime, but nobody approached him, which adds suspense and drives the plot. The story follows the amateur detectives as they unravel this mystery and solve the case by eventually discovering who Evans is and why he holds the key to solving the crime.

Hence, the question "varför frågade de inte Evans" is a thematic and narrative device rather than a literal question about why someone failed to ask Evans. It is the mystery that initiates the investigation and is resolved through the plot progression. If you want more details about the plot or character Evans specifically, that can be addressed too.