The Pullein-Thompson sisters — Josephine Pullein-Thompson MBE (3 April 1924-[1]), Diana Pullein-Thompson (born 1 October 1925) [2] and Christine Pullein-Thompson (1 October 1925–2 December 2005[2] — are British writers of several horse and pony books (mostly fictional) aimed at children and mostly popular with girls. They started at a very young age (initially writing collectively) and they were at their peak in the 1950s and 1960s, but their popularity has endured. They have written a collective autobiography Fair Girls and Grey Horses.
All 3 sisters have written at least 1 book under a different name; Josephine wrote 1 under the pseudonym of Josephine Mann, Diana 3 books under her married name of Diana Farr and Christine wrote 2 books under the name of Christine Keir.
Their mother, Joanna Cannan (1898–1961), sister of the poet May Cannan, wrote similar equestrian stories, but is better known for detective mysteries.
I think I liked this book more than the other two Phantom Horse books I've read. I don't know what it was, exactly, but I found it much more enjoyable. For one thing, Angus seemed so much nicer. I got a bit annoyed with him in the other two books, particularly Phantom Horse in Danger, but in this one I liked him and he was much nicer to Jean. And as for Hans, he was so nice I almost wished Dominic wasn't there so I could ship him and Jean :D The mystery itself was very good. I guessed what was going on, of course, but I thought it was very well laid out. And I felt sorry for one character even though they were a criminal :) I would never consider Phantom Horse as one of my favourite series, but I was pleasantly surprised by this one. The mystery was well developed, the characters were realistic, and it was quite suspenseful in places. If I ever find more of the series, I will definitely read them.