One of SF's classic stories by one of it's greatest masters.

The sequel to Ringworld . Louis Wu, Speaker-to-Animals, and the Hindmost return to Ringworld. Their aim is to prevent cataclysm. In the process, they find themselves learning Ringworld's incredible secrets.

Aliens - Moties - were first contacted in AD3017 in the region of space known as the Coalsack. The eponymous mote in his eye, which has winked out, much to the distress of pious Himmists, just might have been Motie laser light. It might even indicate the position of their home planet.

Gateway: an artifical spaceport, full of working interstellar ships left behind by the mysterious, vanished Heechee. They are easy to operate, but impossible to control - some come back with discoveries which make their pilots rich; others return with their remains barely identifiable.

'The ultimate hard science fiction novel' James Blish

The ad man sets his sights on the gravy train that is Venus: unconquered and waiting to be populated by Earth's capitalist-driven consumers.