I am new and taking a class but would like to purchase the Classroom in a book to help me at home. It varies in price from Adobe Press to Amazon. If I buy it from Amazon, can I get updates? I have Creative Cloud Suite and purchased the monthly bundle of PS, BR, LR. In fact, ARE there updates offered over time?
As far as I know, you need to contact the publisher... Adobe Press is a separate entity, not supported in these forums
I work on those books. It doesn't matter where you buy the Classroom in a Book, Amazon is perfectly legit.
Once you buy it, go to peachpit.com/register to add the book to your Peachpit account (of course, you'll need to create a Peachpit account if you don't already have one; they're the publisher of Adobe Press books). Once the book is added to your account, online material is made available for you to download including the lesson files you'll need for the book, and any updates.
At this time there are no updates to the CC 2018 release of the Adobe Photoshop CC Classroom in a Book.