Peter Gray was born in Dublin, Ireland, during World War II, coming at the tail end of a very large family. First educated by Christian Brothers, he later studied veterinary medicine at University College Dublin.
- After three years spent in a mixed agricultural practice in Devon, England, he set up business in Fermoy, Co. Cork, where he became part of a developing Thoroughbred horse breeding industry that was then in its infancy.
- This experience is reflected in his Allen Series books and in those on soundness and pre-purchase examinations, the latter having come from time working in international sales arenas.
- He moved to England in the mid Eighties and resumed practice in the Midlands, where he wrote his equestrian books published under the J. A. Allen and David & Charles imprints.
- His clinical experience is reflected in these books which cover the expansion of his interests into performance, athletic injuries and rehabilitation.
- Telemachus was written after a family experience in nurturing a baby housemartin. The story began as an attempt to trace the migration path and life of the birds, but grew into something more complicated.
- Premonition – A Story of Ireland is a memoir. It pursues the path of his life but extends far beyond that to follow the changing face of a country that had had its own wars and managed to emerge into the light of freedom.