The site is full of 'spoilers' for the book

Living Labyrinth

by Ian Stewart and Tim Poston

If you can't read St Matthew's Gospel because St Mark gave away the resurrection, don't explore further.

I like background on books:
let me in, and do not warn me again

or Go to where I can get the book.

Power And Energy

Primarily animal muscle (including human), and water power, as heavily developed as in mediaeval Europe. Waterwheels and The Medieval Machine describe very clever craft and exploitation of every erg of gravitational potential, even without quantitative analysis (or capitalism) but the Cistercians didn't have syntei.

The large populations of high places imply high (in both senses) sewage production, which is not wasted: it drops through an alternation of syntei and power wheels to wider, lower lands where it fertilises the fields.