The Djinn is a novel written by Graham Masterton. It was first published in 1977.
Description[]
An Arabian spirit (The Djinn of the title), trapped inside an ancient jar, is released from its prison - with predictably disastrous results. Harry Erskine, rogue psychic (who also appears in the Manitou books) investigates.
Typical early Masterton - slim, fast-moving, occasionally horrific and often fun. Erskine is an eccentric character who adds much to an otherwise sleight tale.