I don't believe I mentioned the term, CMS, in the original review and I don't normally call it that as I know it is not the first thing people think of. The above description comes from Moodle.org and it spells it out in the description. As stated in the intro it says "This book, intended for users with a solid knowledge of the Moodle software and Moodle technologies, does a...". I guess I didn't think anyone would read a book on a specific, detailed topic on a topic if they don't know what the topic is. But thanks for the feedback, it makes sense to include terms and 1-2 sentences on the main topic - I'll keep it in mind!