Recommended book(s) for Articulate 360?

I do not know much about the books, but I have found that a subscription to Lynda.com has been more than helpful when mastering the software. Since their videos are broken up into smaller parts, I can usually find what I am looking for without watching hours of videos.

Either book is fine, I think the uncovered series is probably more popular, especially when just getting started. It's the one I see most at workshops. The challenge with the books is keeping up with the changes in the features.

We also have a user guide and tutorials with practice activities.

@Diana: I'd look at the User Guide link above as it has all of the detailed info on using the features and is what is covered in any of the books and it's updated as the product is updated.

I'd also check out the webinar resources pages we do in the training. You don't need to watch the entire video. You can use the bookmarks to jump to specific parts. 

Refer here and there. The more resources you have, the better for you. I recently searched for information about artificial intelligence, as a result, you can use this link and learned a lot of useful things. Before that, I always looked at everything that interests me on one resource. It's not worth doing this, but I recently realized this. It is better to check information everywhere.

I used the eLearning Uncovered book for quite a while when working in Storyline 3. However, Storyline 360 has many new features and is regularly updated, which means any book would be quickly out of date. 

I highly recommend bookmarking Articulate's User Guides instead. You can find them all here:

Articulate Tutorials & User Guides - E-Learning Heroes 

I'm the one who perceives visual info better than reading. So, the webinars recommended above by Tom and Articulate's Youtube videos helped me so much.