written quality works?
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Persig's Zen and the Art of Motorcycle Maintenance is a "modern" (it's actually getting pretty old now too) transendental classic.
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Try Ken Wilbur and Deepak Chapra. Ther are others, I just can't bring them to mind because I never read them.
Depends on what you are looking for, but have you gone through some of the foundational stuff like Kant or some of the Vedic texts?
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