Jean M. Auel wrote The Valley of HorsesThe Valley of Horses was released 19821982 was the year that released War Horse. War Horse is directed by Steven Spielberg
[Human]: Do you have any information on the author, Jean M. Auel? [Assistant]: Jean M Auel is well known for two books, The Valley of the Horses and the Shelters of Stone. [Human]: What genre are they? [Assistant]: I can tell you that The Valley of Horses is  historical fiction novel for one. [Human]: When was it released? I do like historical fiction! 
It was 1982, the same year that Harry Potter and the Philosopher's Stone was first published.