The "Confabulist" by Steven Galloway

Confabulation, in Psychiatry, is the replacement of a gap in a person's memory by a falsification that he or she believes to be true.  Confabulation is distinguished from lying as there is no intent to deceive and the person is unaware the information is false. Although individuals can present blatantly false information, confabulation can also seem to be coherent, internally consistent, and relatively normal.

The narrator, Martin Strauss, is informed by the doctor "Yours is a rare condition," he said . . . "in which the damage that is being done to your brain does not destroy cognitive function but instead affects your brain's ability to store and process memories. In response to this, your brain will invent new memories (2)."  Strauss has been diagnosed to have Confabulation.

The novel the "The Confabulist" by Steven Galloway is an amalgam of magic tricks, Houdini stories and the intrigues of several nefarious characters all of which are narrated by Martin Strauss who suffers from confabulation.

I am less interested in the plot to the story than to the idea that the point-of-view character who is also the narrator of the story has a condition that could render his memories, or some of his memories, false.  This affects the reliability of the narration and thus puts the reader in doubt about what can be considered true in the story.