Try the MyDat Trucker app. It's free and gives fuel prices, service, Walmart locations, rest stops, truck washes. You can search by direction, fuel price, distance or highway.
Of course, Pilot/Flying J have their own app as I'm sure most of the other truck stop brands have.
I ave found print to be outdated before you even receive it. Remember, they have to gather the data before the book is printed. Then get it out. Who knows how old it is when you finally start to use it. Apps are almost always updated on a regular basis.
Just my 2 cents.
2007 Newmar Essex 4508 All Electric
Thor, my Min Pin Wing-man