An Introduction to the Philosophy of Mind (Cambridge Introductions to Philosophy) by E. J. Lowe Paperback, 334 Pages, Published 2000 by Cambridge University Press ISBN-13: 978-0-521-65428-9, ISBN: 0-521-65428-9
Boxes and Diamonds An Open Introduction to Modal Logic (Open Logic Project Textbooks) by Richard Zach 268 Pages, Published 2019 by Independently Published ISBN-13: 978-1-07-732138-0, ISBN: 1-07-732138-4