 But in the Ashleigh Series Mona gets a Thoroughbred for Christmas, names her Frisky like she and Ashleigh had planned, says she is sorry and is not trying to rub it in as soon as she tells Ashleigh, and asks her to come over tomorrow to ride Frisky.The entire Ashleigh series is in a sort of "time bubble" and none of the events really line up with the events in the other Thoroughbred books, so it is almost a stand alone series in and of itself.In 1998, HarperCollins republished three books as part of the "Ashleigh's Thoroughbred Collection", books that were similar to "Thoroughbred" and were also written by authors of the series.