
The Mobile Internet Handbook, by Chris Dunphy & Cherie VeArd (Technomadia)
This comprehensive book is a guide to what you need to know about your Internet connection in your RV. I have read the book and gone back to it for reference. They regularly update this book to the most current technology information. Technomadia also has a website: RVmobileinternet.com that is available for subscription to get the most current information.
Retire to an RV: The Roadmap to Affordable Retirement, by Jaimie Hall Bruzenak and Alice Zyetz

We use this book for reference. We, of course, do not plan to see every site--but the book lists things that are not in every "Chamber of Commerce" Internet searches. There are unique Restaurants, Beaches, Forests and a variety of attractions.
Motor Carriers' Road Atlas, Rand McNally
We purchased the laminated, spiral bound version, although there is a less expensive version that is paper. This Atlas is specific for Truck Drivers which makes it perfect for us. If a Semi-Truck can be on a road... so can we. Truck Routes are easy to follow. Low clearance bridges are documented. It is handy to have for reference. I often carry it in the truck when we are traveling, just to make sure we are on "safe" roads.