Oman Off Road by explorer is an excellent guide for all off road trips about Oman. The maps are generally clear and also give specific GPS co-ordinates. This book also contains information about the various areas you could visit and the best time to visit. It also provides information about the Flora and Fauna in the area.

 Explorer have also published a "Trekking Oman" guide , a residents guide and recently a "Weekend Breaks" guide for Oman and the UAE.

 For cultural issues, a book titled "Don't They Know It's Friday? Cross-Cultural Considerations for Business and Life in the Gulf " by Jeremy Williams provides important information on the customs and traditions of the region (specifically the GCC).