Leviathan Robert Shea, Robert Anton Wilson  

Pilgrimage to Earth Robert Sheckley  

Shards of Space Robert Sheckley  

Notions: Unlimited Robert Sheckley  

Store of Infinity Robert Sheckley  

The Man in the Water Robert Sheckley  

Citizen in Space Robert Sheckley  

Journey Beyond Tomorrow Robert Sheckley  

The Status Civilization Robert Sheckley  

Untouched by Human Hands Robert Sheckley  

Mindswap Robert Sheckley  

Can You Feel Anything When I Do This? Robert Sheckley