Times Online (UK) has a nice review of Gypsy Jazz: In Search of Django Reinhardt and the Soul of Gypsy Swing by Michael Dregni. Looks like an interesting read:

“In search of Django Reinhardt and the soul of Gypsy swing”, as the subtitle has it, Dregni journeys across Europe, following a trail which leads him down enticingly dark alleys into Romany caravan sites, backstreet bars, flea markets and out-of-the-way guitar workshops to meet and interview Reinhardt’s musical heirs. In the closing chapter, he jams with the maestro’s nineteen-year-old grandson (“I muddle through the tune and receive a satisfied bien”), then falls asleep on the train back to Paris “exhausted by this most dangerous of all guitar lessons”.