Sally Mcbride: 2 books

Marrula Tamara, once Empress of Worlds, has been exiled for treachery to a planet called Strand. She has one great treasure: the engineered horse Raj’azul. In his blood lies the secret of her immortality…and the seed of her downfall. As her fellow exiles form a primitive society, centuries...

Laine, a twenty-something grad student, knows her wayward brother Innis must be up to no good in Britain. She's the big sister, the sensible one, but when she tracks him down, she finds more than she bargained for. Innis has found their biological father Jaird—a shape-shifting stallion with a taste...