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
The Maker of Universes

1965 • 3 Readers • 262 pages • 3

#2
The Gates of Creation

1966 • 8 Readers • 159 pages • 3.7

#3
A Private Cosmos

1967 • 1 Reader • 3

#4
Behind the Walls of Terra

1970 • 8 Readers • 220 pages • 3.5

#5
The Lavalite World

1977 • 8 Readers • 227 pages • 4

#6
Red Orc's Rage

1991 • 8 Readers • 3