
Hmmm...that's a good question. My nerd side says to do the workbook (answer all questions orally but only write out the ones they'll be tested on) so that the information is really cemented in.
My soft side (wait, I have one of those?) says to read the book, enjoy it, and have it around for reference...and maybe listening to it in audio book form, too.
If you've got eager, voracious older readers, merely reading and discussing the book may be totally fine. If they're more reluctant or have trouble retaining name/places, you may want to do the workbook - even if you do nothing more than purchase the TG and lead discussion questions.

***I hope this makes sense. Typing on my phone in a waiting room and I can only see two lines at a time. My apologies if this is disjointed!***
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