Keep going back to Robin Lane Fox, the guy is a tweedy provacateur. Love it.
The Arabs in Antiquity: Their History from the Assyrians to the Umayyads Jan Retso
He gets all interesting and speculative just at the end bit (and he parenthesises it, saying hes dropping the scholarly paradigm for some fun) talking about Hud and arab druid/bard equivalents. Not saying Arabs had druids, just my take on the sort of notions he was prepared to have a flaky stab at in an afterword kinda way.