Moab is known world wide for it's awesome 4x4 trails. They range from "Simple" to "Tear up your Rig" and everything in between.
If you want digital trail maps on your phone or tablet you can use On-X off road. Sign up for a free trial! It's what I use almost every day. On-X Off Road
Since this is a Free in Moab site a FREE hardcopy trail guide can be found at the Moab Tourism Center ,the Moab Diner or other places that have leftover Easter Jeep Safari guides. These guides have descriptions of numerous trails in the area from easy to hard. If you want a more detailed guide book (not free) check in the Moab Tourism Center and ask them for the trail bible. They'll know what you want.
You can also check out the Red Rock 4x4 Club trail guide. They are the club that sponsors Easter Jeep Safari.
Be prepared when you off road here, and never wheel alone. Many of the trails here are VERY remote and way out into the desert with NO CELL SERVICE!