Against A Dark Background by Iain M. Banks (Kindle Edition)

Lady Sharrow was once the fearless leader of a combat team in one of the sporadic little commercial wars in the vicinity of the planet Golter. Now she is hunted by the Huhsz - a religious cult hellbent on assassinating her - and her only hope of escape is to ­find the last of the apocalyptically powerful Lazy Guns before the Huhsz track her down.

Her journey through the exotic Golterian system is a destructive and savage odyssey into her past, and that of her family and of the system itself.