I’ll be totally honest–I have never used the book feature, TOC feature, or cross-reference feature.
One reason being that I work on long documents, and our clients insist on one single file with all the text threaded.
The books range from 400 to 1,200 pages. And they insist on one single file.
TOC numbers and cross-reference numbers are filled in by the proof reader or the editor.
Another reason for me (and the company) doing things the old-fashioned way is because books need to be done at rock bottom prices, and deadlines. It’s not uncommon for us to have to get first pass done in two days (sometimes less). And for the TOC, I just usually print out the page, fill in then numbers in pencil by hand, and then type them in.
Again, because of how much that can be charged per page and book, we don’t have the luxury of using many features that InDesign offers, such as tagging cross reference things, setting up the TOC to put in the numbers automatically, indexing, etc.
Any extra time I spend on a job means less profit. I am totally serious when I say that every minute counts.
Since you are new to InDesign, I’d suggest that you do one long document. It could take you a lot of time to figure out many of the features InDesign offers otherwise.
As an aside–I remember my first InDesign job. This was back when InDesign was new (I think I had ID 1.5). Anyway–one of our clients asked if we used InDesign. Of course, our sales folks said yes–to say otherwise would have been stupid. But–I had been playing with it and teaching myself, so I was somewhat familiar. And–other vendors said “no,” which was not too smart.
The job was supposed to be a “simple” job.
Well–it was filled with about 200 images, and was actually very complicated. It was something I could have done in Quark with no problem as I was great with Quark. But it had to be InDesign.
I got the job done by the deadline (back then our deadlines were a week or two), and then every InDesign job they had after that came to us.
I ended up teaching my coworkers how to use InDesign before we had a pro come up to train us further.
Sorry for rambling. I do think since you are new to InDesign that you take it slow and don’t overwhelm yourself. Do a long document.