Love and Mystery Ride the Rails.
  In a time when women find career options limited, four Chicago women get the chance of a lifetime -- busting a ring of train robbers for the Pinkerton Detective Agency. Working undercover in Windermere Falls, Colorado, they begin to unearth clues overlooked by their male counterparts.
  Nobody's expecting much from these female operatives - but breaking the case may take only some womanly intuition and a little faith. Will they ride the rails to success...and love?

"Skirted Clues" the novella by DiAnn Mills.

   Working on a ranch even though she's terrified of horses, Moment Alexander filters a jumble of new clues. Can she overcome her fears to chase down the thieves - and at the same time lasso a husband?