Could you suggest an introductory book on metaphysics. thank you

I think the best introductory book on metaphysics published in the last 40 years is: Metaphysics by Richard Taylor. I think it is outstanding in its clarity and structure. For slightly more challenging, but more recent books, check out the books on metaphysics by E.J. Lowe (a British philosophy at the University of Durham) and Michael Loux (an American philosopher at the University of Notre Dame).

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