Highfire : a novel
(Book)

Wyvern, Lord Highfire of the Highfire Eyrie, is the last dragon on Earth and is hiding out in a Louisiana swamp. He strikes a deal with Cajun swamp rat Squib: Squib will keep him company and fetch supplies for him and Vern will protect Squib from the dirty cop that is chasing him. However, there will be soon be a firery reckoning, in which dragons wither finally become extinct or Ver's glory days are back.