Essential Reading
ISBN# 978-0761536437
ISBN# 978-0470688670
The Art of Game Design: A Book of Lenses
ISBN# 978-0123694966
ISBN# 978-1594742774
ISBN# 978-0761536437
ISBN# 978-0470688670
The Art of Game Design: A Book of Lenses
ISBN# 978-0123694966
ISBN# 978-1594742774