John Patrick 
Order Of Zendarkin [EPUB ebook] 

Story has adventure, nice for even middle-aged readers Benevolence is reassuring:

If you are ever lost or injured in the woods, find a Geocacher. After tending to any first aid needs you may have, their attention will turn to map data on their smart phones. They will tell you your exact latitude and longitude, along with detailed information regarding your proximity and compass bearings, for any place you need to find. In addition, they will show you a map with that information, which also reveals the topographical characteristics of the terrain and any streams, rivers, ponds or salt water bodies you may encounter along the way; along with bridges, hazards or crossings in the path.