Reddit mentions of Mountain Biking Arizona Trail Guide: Fat Tire Tales & Trails

This is a pretty popular local guidebook. I've used his hiking book extensively.

You might consider hiking up Cathedral Rock, too. It's spectacular.

You might want to grab a copy of this:

https://www.amazon.com/Mountain-Biking-Arizona-Trail-Guide/dp/0966476999/ref=pd_sbs_14_t_0?_encoding=UTF8&psc=1&refRID=ZJE91KCV8KSNRZ23KTCZ

They also sell this guidebook at every REI in the Phoenix area.

Trail 100 is my favorite and varies from very easy to moderately technical.