Grafton Press, 1989
 
The Vertical Plane by Ken Webster is a fascinating account of alleged interdimensional communication that unfolds through a series of mysterious messages appearing on a 1980s computer in a small English cottage.
 
The story begins when Webster and his girlfriend, Debbie, start receiving cryptic text messages on their BBC Micro computer, purportedly sent by a 16th-century man named Thomas Harden. Harden, claiming to inhabit the year 1546, describes his own time period and poses philosophical questions about existence, as well as his awareness of Webster’s future reality. As the messages continue, Webster finds himself embroiled in a strange, evolving dialogue that raises questions about time, parallel dimensions, and consciousness.
 
Blurring the lines between paranormal investigation, science fiction, and historical mystery, The Vertical Plane invites readers to consider the nature of time and reality itself. The book has since become a cult favorite among enthusiasts of the paranormal and unexplained phenomena.