Horse & Pony Books:
ILLUSTRATED BY RICHARD KENNEDY
SUMMARY: Morning Star, a top racing filly escapes from her yard and ends up in Scotland where she is rescued from a bog by a crofter who uses her as a riding horse and eventually breeds from her. Her son Black Mystery, becomes the mount of the crofter's son Mike, and the boy thinks the horse will win races. Mike is an aspiring jockey and must leave his colt behind to join a yard in the south, coincidentally the same yard from where Black Mystery's dam disappeared! When the trainer Johnny Dare sees a photo of Black Mystery's dam he notices the resemblance to the long-missing filly. Could this be Morning Star? And if so could Black Mystery have inherited her talent?
PONYMAD RATING: 2 - 3 HORSESHOES
As far as I know not reprinted at all. Extremely rare book. May be expensive if you can track one down.