Any recommendations for sci-fi or fantasy from an untrustworthy perspective? I really enjoy books with an unreliable narrator but I only seem to find them in traditional fiction and mystery genres.

Lolita, The Sound and the Fury, Heart of Darkness were all very engaging but when I look for an unreliable narrator I usually find fiction, short stories and murder mysteries. Any recommendations for a sci-fi or fantasy book with an unreliable narrator?