The Petticoat Doctor (Heartsong Presents)

is book #840 of the Heartsong Presents line.
==Book Description==
Nothing in Abbie's life ever prepared her for the west! — When Doctor Abigail Hayes decided to join her long-lost brother in Utah, she could not have imagined the journey she set out upon. Jake Maverick has come to escort his friend's sister home from the train depot. When he finally catches up with her, the trouble she brings makes him wonder if they'd have been better off if she never showed up at all! Can either of them find the amount of trust required to survive the West?
(Description from paperbackswap.com)