The Star Trek Encyclopedia is an exellent source of information for Star Trek fans, especially those who are die-hard. I liked the book because it has very good information on ships, characters, and more. The book also has information on bloopers and other parts that actors played. For example, the book pointed out that In Star Trek II: The Wrath of Khan, Khan said he remembered Chekov from "Space Seed", unfortunatly this is impossible because Chekov's character was not yet created.
The is book is also good to get information on broad subjects, like ship classes and planets etc. For example, the book has lists of all the named ships, their classes, and what they did in relevance to Star Trek.
The book doesn't tell info on the books, but it is good in all other areas, episodes included. I would recommend this book to all Trek fans who ever wanted a place to look something up.
This book is much better than any other Star Trek info book I've ever seen, it also comes with free blueprints of the USS Enterprise D, so its a must.