From the back of the book
The Enterprise blazes new star trails to danger as Kirk, Spock and the rest encounter –
an asylum planet where the mad rule
a universe with a total population of one
race warfare to the death – whiteblack against blackwhite
paradise – with a most unusual serpent
the ultimate in women's lib
an almost eternal triangle
a gang of galactic drop-outs
– and other startling problems and perils.