Craig, I'm sure that the one you recommend is a better book for teaching the cub couts from. The teacher needs to be able to show enough enthusiasm that there will be plenty to rub off on the students, and ``The Complete Rigger's Apprentice'' will be a big help there.
I agree, don't start the cubbies with TCRA. I guess I hadn't realised that he was looking for a text for the kids to use. TCRA for the teacher, and something appropriate for the little guys.
It is a waste of time, money, and effort to study the large knot books.
If you're thinking of something like Ashley's book, I agree with you. Those books are endless, tedious lists of minor variations on knots you'll never use, and you can't imagine why anyone ever would use them.
TCRA is a relentlessly practical book (except for the section on decorative knots, which is only slightly practical), and does a great job of explaining and motivating some really useful knots, and teaches you how to tie them in the real world.