We don't use any books like you describe, but rather begin our trip planning with deciding what our ultimate destination will be for that trip (we generally take one 30+ day trip a year along with several week-long trips locally).
Once we have a general idea of which direction we are heading, one of our first stops is the
Find a Park section of the National Park Service website. We pick which states we will go through and then decide if any of the parks are someplace we want to spend time. I then research the
State Parks for the states we will go through, both for scenic spots and campground ideas. I then check to see if my route goes near any of the various
Scenic Byways. To pick camping spots, I generally go to this
Campground Map, enter the nearest city or town, and scout out our campsites for various stops along the way. Once we have our route and stops selected, I search Trip Advisor to see if there's some very special restaurant for dinner every few days (gives me, the cook, a break!). Don't forget to visit the website of the National Forests you might travel through. They often had a link to "Special Places" that will give you more ideas.
Want to travel to some of the more out-of-the-way places? Check out
this link for lots of trip reports on RV.net from those who own truck campers. It's broken down by region. For those of you who haven't seen it, check it out. They sure like they have fun over there on that forum! (Note: not all of the trips are on rugged back roads, so check out several different authors.)