Hiram is one of several Taltos who live on the secret island owned by the ancient Taltos Ashlar and his wife, Morrigan, daughter of Mona Mayfair, the vampire fledgling of Lestat. When Ashlar and Morrigan’s son Silas causes a rebellion, a drug cartel invades the island, killing many Taltos and capturing several others. Ashlar and Morrigan’s other son, Oberon, last sees Hiram escaping when their companion Elath is shot dead.
Hiram appears in Blood Canticle (2003). For more perspectives on his character, read the Alphabettery entries Ashlar, Elath, Mona Mayfair, Morrigan Mayfair, Silas, and Taltos.