Midnight at the Casa Luna is a radio drama, produced by the ZBS Foundation. The two parts of the story were released individually in 1998 and 2000; part two has the title The Hungry Ghosts. It is the eleventh of the Jack Flanders adventure series, and combines elements of Americana and Old-time radio with metaphysical concepts such as Sufi wisdom and Tibetan Buddhism.

One evening Jack Flanders is wandering the streets of New York, close to his home, when he notices a tree-lined street he'd never seen before. Down this street lies an interesting looking coffee shop called The Casa Luna. Jack enters and finds himself talking to the Balinese waitress, Nani, about another Casa Luna that Jack had visited whilst in Bali. A mysterious woman, Nina, arrives and persuades Jack to come with her, leading him to a journey through the dream-like dimensions of higher realities. Along the way they are joined by Leela, an Infrit ("They don't like being called demons!") and Jack's uncle, Sir Henry Jowls from The Fourth Tower of Inverness, and try to capture a large magical green stone - the source of the dangerous and infamous Dragon Lady, Madame Zee's power.

The second part of the story finds Jack back in New York, searching in vain to find the Casa Luna again. When a strange being appears, threatening him, the Casa Luna comes to the rescue and once again he joins forces with Sir Henry Jowls and the Leela - although they are a different Sir Henry and Leela with no memory of the events in Part One. Jack persuades them to help return the green stone to the sacred city of Merkahbah - as his dreams have been telling him so to do.

This adventure marked a return to many of the middle-eastern and metaphysical themes missing since the earliest stories and it ends with a phone call requesting Jack to Return to Inverness. Much of the voyage in Part Two, through the land of the Hungry Ghosts, is a re-working of Jack's last journey in The Fourth Tower of Inverness.

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