You can patent all sorts of things. Business practices, etc. The one-click on Amazon.com? That's protected by a patent. It's not a software breakthrough of any sort-- it's a business model.
All sorts of ridiculous things are protected by patents now. Theoretically, he could have patented a system of Japanese language education if he had really wanted to. The downside of patents, though, is that they don't last too long compared to copyright, but they do give you a complete monopoly for a some time. (I think it's about 20 years now.)
The tables in the back are still copyrighted information, and reproducing them in any form without permission (or without a safe harbor in the law) can make the offender liable for damages. You might think it's a stretch of an argument, but you don't want to gamble your livelihood on that, because if you lose, you lose big.
Now the really important thing with copyright is REGISTRATION. Yes, if you write a book and don't register it, a right of copyright is instantly created, HOWEVER, that right is controlled by the state you reside in, for the most part, and your damages are limited to whatever the STATE statutes say. (Usually not much. In NC, you have to prove actual damages-- that is, I actually suffered $X worth of damages.)
If you register your copyright with the US Government, you get the full life of the author + a bunch more years deal (Edited because I forgot just how many years it goes on...just ask Mickey Mouse and you'll get an idea.). You shift the jurisdiction to the federal courts, and even more importantly, you get statutory damages as set out in the federal statutes, and those damages are very high indeed. There's NO burden of proof that you've been damaged. You simply must prove infringement. Copyright infringement damages are high, and they get higher with each infringement. It's nasty business.
There are (shrinking) safe harbors, but it's best to ask for advice before proceeding. Because in this case, it's NOT better to ask for forgiveness after the fact. Another part of intellectual property law is that holders of intellectual property rights have an obligation to chase down infringers, or they can LOSE their copyright/tradmark/patent. A good example is how Xerox and Kleenex fought to keep their logos out of the dictionary as words. If they had let their brand names become common words, they would have lost their trademarks, and anyone who made "facial tissues" could call them Kleenexes. (Scumco's box of 200 kleenexes!) or (Scumco's xeroxing machine!) had to be prevented.
Same goes for copyrighted ideas or inventions. If you get a patent, you have to defend it, or else the you cede control of it to the public domain. And so on.
I'm not judging the good/bad of it, just telling you how it works. And all of these IP rights are protected internationally through treaties. (The Berne Convention, if you must know, and the WIPO controls it. World Intellectual Property Organization.)
Naturally, this is the state of IP law the last time I looked at it... which was about 10 years ago. So disclaim disclaim, blah blah, this isn't legal advice.
But like I said, it's all moot here.
Edited: 2008-07-08, 1:30 pm