We Have Always Lived in the Castle (1962)

Merricat's account of her family's secluded life mixes precise household observation with private rules and magical thinking. Her sense of what is normal creates the unease: a calmly stated preference can sound much more alarming than a dramatic confession. This is a compact choice for someone who likes hearing certainty conceal its own gaps. Family poisoning, hostility and violence sit underneath the apparently ordered voice; avoid a plot-heavy introduction before reading.