Firefly Magnificent Nine Novel

"Jayne's ex, Temperance McCloud, gets in touch begging for help. She lives on a desert moon where bandits are trying to gain control of her town's water supply. Jayne persuades the Serenity crew to go there, but on arrival they discover two things: outlaws with a fanatical devotion to their leader who will stop at nothing to get to the water, and that Temperance has a daughter born less than a year after she and Jayne broke up called Jane McCloud "