I've always been fascinated by historical mysteries and especially the stories of WWI aviators such as Georges Guynemer and especially Frank Luke both of which died under mysterious circumstances. If any of that interests you then I recommend getting THE STAND: The Final Flight of Lt. Frank Luke, Jr. It is the definitive account of Luke's last flight and final stand before being killed. Amazing story and an amazing person.
If anyone else is into stuff like that and have some book recommendations I would appreciate it.