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Mark Walker

48 books

444 pages paperback 1993

medium-paced

94 pages paperback 2013

400 pages paperback 2009

nonfiction sports adventurous challenging reflective slow-paced

265 pages hardcover

nonfiction nature philosophy science informative medium-paced

70 pages paperback

nonfiction business computer science medium-paced

60 pages paperback

nonfiction autobiography biography memoir medium-paced

187 pages digital

289 pages digital