Required Books
The only time I will ever say that one specific book is required to pass an exam is right here. I think the Architect's Handbook of Professional Practice is required reading for Practice Management and Project Management.
That said, my advice for ARE 5.0 success has always been to study mostly from the primary resources, the ones listed in the NCARB ARE 5.0 Handbook, and then supplement with third party material, like Hyperfine.
With that in mind, I have used the most common, and I think most valuable, books from the NCARB Handbook to write this course and source my answers. Those books are listed here.
(this is pretty much the same list I provide for the CE course)
The Architect's Handbook of Professional Practice
Link: https://amzn.to/3Qlvboe
Professional Practice: A Guide to Turning Designs into Buildings
Link: https://amzn.to/3QqXAJO
Law for Architects: What You Need to Know
Link: https://amzn.to/3QrL38W
The Project Resource Manual: CSI Manual of Practice
Link: https://amzn.to/3vKvhwb
These are all Amazon links. As a member of the Amazon Affiliates I receive a commission for any products you buy after following one of these links. It's 4.5% for book! You can read more about affiliate marketing, passive income and website monetization in my free(ish) course, Intro to Passive Income. But maybe finish the ARE first?!