If a story has an unreliable narrator, you should still trust what they say, although you must take it with a grain of salt. The narrator could still be telling the truth, although if they are insane they may describe seeing a ghost when there wasn't really a ghost. An unreliable narrator does not create a fake story, only an unreliable story, where there may be holes or lies weaved into truth.
They both enjoyed eating crackers and cheese
"High Dive" by Jonathan Lee is a novel.
A novel is an extended fictional narration that entertains readers with complex and interesting events and characters.
"High Dive" is an intriguing novel that tells the story of a plot to kill Britain's Prime Minister and his complete committee, by setting a bomb in the seaside town of Brighton.