Whistler in the Dark — Kathleen Ernst

It's 1867. Twelve-year-old Emma Henderson is mortified when Mother takes to wearing a Reform Dress -- hideous bloomers! Worse, Mother has accepted a newspaper job in wild, far-off Colorado Territory. But even Emma can't imagine just how badly things will go in Twin Pines. From the moment she and Mother step off the stagecoach, it's clear that someone doesn't want them there.