책 1

Maybe Yes, Maybe No: A Guide for Young Skeptics

작성자 Dan Barker, Brian Strassburg
Jan 1, 1990
영어
페이퍼백
Jan 1, 1997
폴란드어
페이퍼백

책 2

Maybe Right, Maybe Wrong: A Guide for Young Thinkers

작성자 Dan Barker, Brian Strassburg
Apr 29, 2011
영어
킨들