Nova Express and Wild Boys would be considered a hard read but I found them hypnotic and engaging. All the wolfboy sex murderous lesbians with penis noses helped.

Sound and the Fury was probably one of the harder reads but worth it. Can't say it is better than As I Lay Dying or Abasolm, Abasolm! though which are experimental but more approachable reads.

Beckett's How It Is also worked for me despite its extreme minimalism due to the staccato rhythmn of the writing. Ditto White Jazz by Ellroy.