This book is a lot of fun, and also charmingly dated.

The first half is an interesting satire of Victorian society, that feels rather alien in modern context.  The concepts it lampoons are at times so dated they seem barbaric.

The second half though is incredible, as Abbot attempts to rationalize the existence of higher dimensions to his audience.  His description of higher dimensions, and the confusion and chaos that they unwittingly cause when they interact with other dimensions clearly held an influence over many notable figures like Crowley and Jung.

I would recommend this book to anyone who is interested in widening there conscious perspective, or to anyone interested in anything adjacent to Gnosticism or the ideas of the psychonaut community.