content: If Heinlein had mixed "The Moon Is A Harsh Mistress" with the semantic subtheme of his short story "Gulf," and seasoned it with Clarke's "2001" and Disney's "The Black Hole," he could have cooked up this story.I would say the quality of the writing qua writing is competent but merely average, whereas the theories, especially regarding the nature of stars, are stellar. If you have read Harry Turtledove's historically-flavored science fiction, you have experienced this combination.An important thing the book did for me was to reduce the incomprehensible magnitude of space to a mentally graspable size.And--it was a real page-turner