Libro 1
World's End
Upton Sinclair
Libro 2
Between Two Worlds
Upton Sinclair
Libro 3
Dragon's Teeth
Upton Sinclair
Libro 4
Wide Is the Gate
Upton Sinclair
Libro 5
Presidential Agent
Upton Sinclair
Libro 6
Dragon Harvest
Upton Sinclair
Libro 7
A World to Win
Upton Sinclair
Libro 8
Presidential Mission
Upton Sinclair
Libro 9
One Clear Call
Upton Sinclair
Libro 10
O Shepherd, Speak!
Upton Sinclair