Ph.D.

21 books

208 pages 2010

nonfiction history adventurous informative slow-paced

6 hours, 9 minutes audio 2006

nonfiction psychology science self help challenging informative reflective slow-paced

missing page info 2001

medium-paced

missing page info 2004

medium-paced

missing page info 2018

nonfiction childrens middle grade science informative slow-paced

131 pages 1998

medium-paced

missing page info

medium-paced

missing page info 2014

medium-paced

missing page info 1997

medium-paced

280 pages