If you enjoyed both Dostoyevsky, existentialism, and Hesse's work, you will like Colin Wilson's "The Outsider": https://www.amazon.com/Outsider-Exploration-Rebellion-Creati...
which deals with both (and more) and expands on these concepts.
Wilson ended up doing more fringe work, but this was his critically acclaimed initial foray into writing.
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If you enjoyed both Dostoyevsky, existentialism, and Hesse's work, you will like Colin Wilson's "The Outsider": https://www.amazon.com/Outsider-Exploration-Rebellion-Creati...
which deals with both (and more) and expands on these concepts.
Wilson ended up doing more fringe work, but this was his critically acclaimed initial foray into writing.