6 books in series
World of Tiers
World of Tiers is a 6-book series with 6 primary works first released in 1965 with contributions by Philip José Farmer.
#1
#2
#2 of 6 in World of Tiers
1966 • 8 Readers • 159 pages • 3.7
#3
#4
#4 of 6 in World of Tiers
1970 • 8 Readers • 220 pages • 3.5
#5
#6