There is a small library worth of books covering all aspects of RV life but if you want one that covers ownership. Maintenance and the like I have two I can suggest.. Either one will do. One is a Woodalls/Good Sam's publication the other is not, and frankly that is the major difference, and no I do not know which is which.
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The RV Book
The RV Owner's Handbook
your RV dealer should have one or the other or both Camping world of course has the Woodalls one (Since both are Affinity Group)
I found it to be good reading and a couple chapters on maintenance were better than the factory manuals. Both are written by authors who are RVers.