On the planet Noghtshade, anyone can buy or sell Flex, the death-dealing drug, to take offworld but no one is supposed to use it. Nonetheless, Flex addicts are a common sight in Riotmark, the planet's largest city. No one comes to Nightshade for anything but Flex - no one except Benedict and his travelling companions, who believe there may be something even more interesting in the jungle - something Benedict has been searching for all his life.
Used availability for Richard Paul Russo's Inner Eclipse
December 1990 : UK Paperback
February 1988 : USA Paperback