 Battlecry Forever!is a slight exception though.It is about Battlecry (the sire of Fleet Goddess, a filly that Ashleigh Griffen purchases in #5 Ashleigh's Dream of the Thoroughbred series) but it is considered stand alone (due to not playing a major role in the storyline of Thoroughbred), even though it is also still technically considered the only book written outside of the Thoroughbred series that is canon.