While not Super Edition books, #47 Cindy's Desert Adventure and #48 Cindy's Bold Start are two "lost diary specials" published within the regular series in an attempt to explain the missing characters and continuity problems created by the ten-year gap which occurred between Cindy's Honor and the New Generation books.
These books detail how Ashleigh miscarried her second pregnancy, the fate of Wonder's Champion, and Cindy McLean's travels to the United Arab Emirates, New York City, and finally back to Whitebrook Farm.
These books are not distinguished with a separate title indicating their "special" status within the series, but are generally regarded as such and were included within the regular series also in attempts to explain Samantha's story during the ten-year gap created by the New Generation books.
When the plague hits Ashleigh's family, various horses who survive or are sold before the first book, die (Midnight Wanderer, for example, who is put to sleep in the book, 'Goodbye Midnight Wanderer', apparently dies of the mysterious plague, rather than from the accident.)
Ashleigh's Thoroughbred Collection contains three stand alone books that do not tie into/effect the storylines of the other series.