Most of the pieces in this book fall firmly in the science fiction genre, although I consider a couple to be fantasy. Delany's locales range from cities on Earth (Venice, New York) to worlds beyond our solar system.
Delany's stories are both triumphs of science fiction inventiveness and exquisite works of literary art--as well as being compassionate yet unflinching explorations of the human condition. His vision is richly ironic, and often tragic. His prose can be hauntingly beautiful to read--he is a particular master of visual description.
Delany's explorations of emergent subcultures and institutions in many of these tales give the book an intriguing sociological aspect. His topics include crime, punishment, sexuality, loss, suffering, culture clash, space travel, and the fabric of consciousness and reality.
The remarkable title story is a look at the emergence of a new sexual orientation and its related subculture in the context of expanding technology. "Driftglass" looks at a class of physiologically altered humans. "Omegahelm" is a shocking, fascinating story about motherhood and art. These are just a few examples of Delany's fertile mind. I consider Delany to be a unique and essential voice in the science fiction canon; this collection of his short fiction is a volume to be savored and shared.