Hunt's ambitiously subtitled 'human history of the worlds beneath our feet' weaves together numerous aspects of underground activity, related to shelter, biology, mining, psychology, rituals, and urbex, among others. Nevertheless, this is first and foremost a collection of personal explorations below the surface, tied together in topical chapters. • Its initially highly engaging narrative discusses such diverse subjects as Paris’ catacombs, early photography, dark corners of NYC’s subway system, and scientific research for ancient underground life. • Regrettably, somewhere past the halfway point, this book increasingly veers towards mysticism, while getting firmly stuck on links to religious worship. • The black and white illustrations are let down by shoddy end credits, poor reproduction, and often limited size. Furthermore, the publisher's choice of large font and line spacing feels like an attempt at bulking up the book from what should have been less than 180 pages to over 270. • Overall this is still a fairly good, if uneven, read mixing a personal recce ‘diary’ with an attempt at linking all of human history to the underground. • Originally reviewed on FB/MaltaUnderground