"Does Aristotle maintain in the Metaphysics that artifacts are substances, or does he think they fall short of the criteria, whatever these are, of substantiality? This is the question Katayama sets out to answer in his book ... On this ground alone Katayama's book deserves a careful reading by Aristotle scholars." -- Ancient Philosophy
"Katayama does an excellent job of constructing a powerfully sustained argument by marshalling texts from the Metaphysics and Aristotle's biological works. He takes the reader through some of the most complex and difficult topics in Aristotelian philosophy while always keeping the main line of argument highly visible. This is no mean feat." -- Michael Ferejohn, Duke University
"I like the methodological clarity and precision that isolates one problem from the interrelated network of metaphysical problems, clarifies it, hones the problem down to one key term ('apart from'), seeks a solution within the Metaphysics, decides that it is not to be found there, and finds it instead in Generation of Animals." -- Martha Husein, Brock University