If you loved the raw intensity and gritty realism of 'High,' you might find 'Trainspotting' by Irvine Welsh equally gripping. Both dive deep into the underbelly of addiction, though Welsh’s Scottish dialect can be a hurdle at first. The chaotic energy and unflinching honesty in both books make them feel like siblings in spirit.
For something with a more poetic edge, 'Requiem for a Dream' by Hubert Selby Jr. is devastating but brilliant. It’s less about the highs and more about the crushing lows, but the visceral prose sticks with you. Another wildcard pick? 'Jesus’ Son' by Denis Johnson—short, hallucinatory, and oddly beautiful, like a fever dream version of 'High.'