The Djinn by Masterton Graham

(1977)
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. The first-person narrative ensures a fast read.

https://rapidgator.net/file/48353841812de5e4255a75245299b56d/8e5zz2h22f6y.epub

https://nitro.download/view/4B11052DB696DD5/9w3oe96i58eo.epub