"Highly recommended....The book is a pleasure to read. Both mathematicians with interest in philosophy and philosophers of mathematics and science will enjoy and profit from it."--Modern Logic

"Written in a lively, engaging style. We hope it serves to stimulate others to think seriously about issues in the philosophy of mathematics because, as Maddy claims, these issues bear directly on mainstream philosophy."--Philosophy of Science

"The book is written in a lively, engaging style. We hope that it serves to stimulate others to think seriously about issues in philosophy of mathematics because, as Maddy claims, these issues bear directly on mainstream philosophy."--Philosophy of Science

"She has...clearly marked out an original and interesting position."--Times Higher Education Supplement

"Maddy has written a concise and lucid book which covers not only her own ideas on set-theoretic realism and the "reality" of mathematics, but also provides a useful summary of the old and continuing debates surrounding mathematical ontology. This feature makes the book ideal as a classroom text."--Review of Metaphysics