Foundation
☆☆☆☆☆
Foundation and Earth
☆☆☆☆☆
Foundation and Empire
☆☆☆☆☆
Foundation's Edge
☆☆☆☆☆
Il sole nudo
☆☆☆☆☆
Prelude To Foundation
☆☆☆☆☆
Robot dreams
☆☆☆☆☆
Robot visions
☆☆☆☆☆
The Complete Robot
☆☆☆☆☆
The Currents of Space
☆☆☆☆☆
The end of eternity
☆☆☆☆☆
the rest of the robots
☆☆☆☆☆
The Robots of Dawn
☆☆☆☆☆