Thank you for your post!
What's the ISBN of the book you have? Which page are the instructions listed on?
Have a great day!
978-1-119-42040-8, p. 115 (When making a selection...), p. 373 (Imageable area), p. 383 (Choose Window->Name of Panel). I’m sure there are more, but those are the three that I found easily.
Thank you, Stephen!
There have been some updates to Illustrator since the book was released, but those updates won't be readily available until the next edition is published. That is the challenge that comes with books based on software, though they do offer a generally good introduction and guide to getting started.
The simplest solution is to search for the topic on the Adobe Help Center website. For instance, based on the three you found:
You can find the full user guide here: Illustrator Help | Illustrator User Guide
I hope this helps! Please let me know if you have any questions. Have a great weekend!