This novel is unusual for its exploration of a eunuch's psyche alongside that of a cloned individual. They are set side-by-side as unusual human specimens and a sort of equivalence is made between their emotional concerns. One doesn't have the strong sense that either the eunuch or the clone suffers more than the other. It is left an open question.
The title character was kidnapped as a child, castrated, and served a prince as his servant for a while. Later, he was able to have a son by cloning himself. The book opens with the son at age ten and explores the concerns of father and son.
It is also unusual in that the eunuch has a traditional, old-school eunuch job, but is very much a member of the modern world, in that he participates in a cloning project.