Talbot Mundy 
The Seventeen Thieves of El-Kalil [EPUB ebook] 

From the point of view of a serious expert on the events, Jimmarg holds control over the situation to try and prevent bloody fighting in Jerusalem and elsewhere. It involves some trick, which makes some deals that you can not abandon with Ali Baba, the descendant of different generations. Lots of tension, a lot of camels and James Shuiller Thunder coolly do their thing.