18 Hainish Cycle
#1 of 8 in Foundation (Publication Order)
#2 of 3 in Galactic Empire
#1 of 3 in Galactic Empire
#5 of 18 in Hainish Cycle
#7 of 18 in Hainish Cycle
#1 of 1 in The Roots of Chaos
#1 of 18 in Hainish Cycle
#2 of 2 in 四畳半シリーズ
#2 of 18 in Hainish Cycle
#3 of 18 in Hainish Cycle
#1 of 2 in Metro