Metaphysics by 
The Blackwell Guide to Metaphysics by 
A Companion to Metaphysics by 
The Edinburgh Companion to Twentieth-Century Philosophies by 
Contemporary Encounters with Ancient Metaphysics by Try searching the Libraries catalog using these subject headings:
Metaphysics.
Métaphysique.
PHILOSOPHY Metaphysics.
Metafysica.
Browse the shelves at Payson in the call number range BD 95-131 (Speculative Philosophy & Metaphysics).
If you need information about philosophical subjects, persons, places, etc., then GVRL and the Stanford Encyclopedia of Philosophy are good places to start.
Stanford Encyclopedia of Philosophy is a dynamic reference work written, refereed, and maintained by over 950 professional philosophers.
Gale Virtual Reference Library (GVRL) is a collection of encyclopedias, almanacs, and specialized reference sources;these trusted, authoritative reference works are available 24/7.
PhilPapers is a comprehensive index and bibliography of philosophy maintained by the community of philosophers.
"It is not easy to say what metaphysics is. Ancient and Medieval philosophers might have said that metaphysics was, like chemistry or astrology, to be defined by its subject-matter: metaphysics was the “science” that studied “being as such” or “the first causes of things” or “things that do not change”. It is no longer possible to define metaphysics that way, for two reasons. First, a philosopher who denied the existence of those things that had once been seen as constituting the subject-matter of metaphysics—first causes or unchanging things—would now be considered to be making thereby a metaphysical assertion. Second, there are many philosophical problems that are now considered to be metaphysical problems (or at least partly metaphysical problems) that are in no way related to first causes or unchanging things—the problem of free will, for example, or the problem of the mental and the physical." - Peter van Inwagen, Meghan Sullivan, Stanford Encyclopedia of Philosophy, https://plato.stanford.edu/entries/metaphysics/.
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