The Outlaws Scarlett and Browne

"Scarlett McCain is a shoot-first ask-questions-later kind of outlaw. She scrapes by on bank heists, her wits--and never looking back. She's on the run from her latest crime when she comes across Albert Browne. He is the sole survivor of a horrific accident, and against her better judgment, Scarlett agrees to guide him to safety. This is a mistake. Soon there are men with dogs and guns and explosives hot on their heels. Scarlett's used to being chased by the law, but this is extreme"--

Jonathan Stroud