This novel is a touching tribute to Vonnegut's sister, who died at a relatively young age and whose sons he adopted and raised as his own. The story is about a pair of strange twins (brother and sister) who develop the ability of genius thought when physically together. It revolves specifically around the life of the brother, who spends the majority of his life apart from his sister, but with the indelible memories of their brief encounters to drive him slightly mad.

One of their best ideas, which he implements as President of the United States, is to give everyone an extended family, as most of the problems in the world stem from lonliness. Like most Vonnegut novels, it sends a clear message that people are important and that life goes on.

The plot is a thin veil for his tribute to his sister - its acknowledged and gives a really warm, touching quality to an otherwise emotionless piece. The juxtaposition is unique. I like it.