Six Gates from Limbo

Six Gates from Limbo is a science fiction novel by Scottish writer J. T. McIntosh, first published in serial form in Worlds of If magazine.

The serial was titled "Six Gates to Limbo" in the magazine, appearing starting in January 1969.

On awakening in an idyllic tropical paradise, Rex is disoriented and possibly afflicted with amnesia.

He spends his first week exploring, and discovers that his Eden-like paradise is surrounded by a huge unscalable wall 50 miles in circumference.

After a significant amount of exploring, he finds a single house that may hold the answers to his missing memory.