I must first say that I have "Star Trek IV: The Voyage Home" on hardcover in perfect condition! The book, like its predecessors, Star Treks II and III is like an ongoing trilogy up to this point that follows the events starting with "Star Trek II." The story is very entertaining, humorous, and yet scientifically intriguing on whale biology, and ecology. I especially liked the action, and the literal, down-to-earth atmosphere of the novel. I also recommend readers to purchase the sequel to this book/movie, "Star Trek: Probe" which explains the origins of the mysterious probes that came searching for (and to make contact with) humpback whales. "Probe" also explain forecasting events of Earth's ecology due to the environmental damage the probe in "Star Trek IV" inflicted. Seems similar to the issues of today's global warming and El Nino and La Nina trends.