Ponies, ponies, ponies
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Lura Tularski (1905 - ) wrote just one horse book, as far as I am aware. She both wrote and illustrated Star of Stonyridge, and is described on its jacket as an “expert horsewoman”.
Finding the book: the book is reasonably easy to find; though very good copies can be expensive.
Links and sources
Thank you to Lisa Catz for the photograph.
Bibliography - horse books only
Star of StonyridgeBinfords & Mort, Portland, Oregon, 42 pp, illus the author
Star is a strange little scrawny horse, who has a four pointed star on his forehead. He turns intoa remarkable horse.