The book "Strata Titles" by N. J. Moses, Ross Tzannes, and Diane Skapinker does not appear to be a novel by Terry Pratchett, but rather a non-fiction or technical book related to strata titles in real estate law. Here is a summary of the book "Strata" by Terry Pratchett, which is a science fiction novel:

Plot Summary

"Strata" by Terry Pratchett is a science fiction novel published in 1981. The story revolves around Kin Arad, a woman who is thousands of years old and works for the Company, which builds planets using strata machines. These machines were created by an advanced society that died out long ago but have been used by the Company to perpetuate the human race. Kin learns about a flat world discovered by a survivor of a mission to send pilots into the outermost regions of space. This flat world is possibly fashioned by the creators of the strata machine. The novel follows Kin and her companions as they explore this strange, flat world, which is inhabited by medieval-like inhabitants. The story combines elements of science fiction and fantasy, exploring universal questions in a way that keeps the reader guessing until the end.

Key Themes

1. Creation and Evolution: The novel explores the idea of intelligent species evolving and altering the universe to better suit themselves, only to die out before the next species arises. This theme is central to the book's exploration of the universe's history and the role of human civilization within it.
2. Fabrication of History: The book reveals that the entire universe is only 70,000 years old and that evidence and remains of long-dead civilizations were fabricated by the universe's creators to make the universe appear older than it is. This theme challenges the reader's understanding of history and reality.
3. Existential Questions: The novel delves into existential questions about the nature of reality, the purpose of human existence, and the role of advanced civilizations in shaping the universe.

Critical Reception

While "Strata" is not as widely known as some of Terry Pratchett's other works, it has been recognized for its unique blend of science fiction and fantasy elements. The book laid the groundwork for Pratchett's later Discworld series, which is set on a flat world supported by elephants and a giant turtle. "Strata" was originally intended to be a parody of Larry Niven's "Ringworld," but it evolved into a standalone story that explores the idea of a flat Earth in a satirical and imaginative way.

For the non-fiction book "Strata Titles" by N. J. Moses, Ross Tzannes, and Diane Skapinker, there is no information provided in the search results. It is likely a technical or legal text related to real estate law and strata titles, but specific details about its content, key themes, or critical reception are not available from the provided sources.