City of Revelation by John Michell (Ballantine)

A classic case of LTypI: City Bold for City of Revelation.

Written by English esotericist John Michell (1933–2009), it’s the sequel to The View Over Atlantis, which the Fortean Times described as “probably the most important book in the history of the hippy/underground movement.” City of Revelation was first published by the Garnstone Press in 1972, with the subtitle On the Proportions and Symbolic Numbers of the Cosmic Temple. This is Ballantine’s 1977 paperback edition. According to Wikipedia,

This work was more complex than its predecessor, including chapters on sacred geometry, numerology, gematria, and the esoteric concept of the New Jerusalem, and required an understanding of mathematics and Classics to follow its arguments.