Winter of the Whinnies Brigade — Angela Dorsey

On a snowy ride, Evy, Kestrel, and the horses discover they have a tag along: a starving mustang colt. They have to save him. But before they can, they discover some humans in need. A car has gone over an embankment. It seems everyone needs saving today! Then Evy recognizes the occupants of the car: two people she'd hoped she'd never see again. How did they find her? And what do they want with her? Unfortunately, she's about to find out... the hard way!