Crowley attempted to complete the abramelin ritual on the Loch Ness Lake where he had bought a house specifically for this ritual and named it the Abbey of Thelema.

Aleister Crowley's house on Loch Ness is called the Boleskine House. Abbey of Thelema refers to his house in Cefalù in Sicily, Italy.

I read quite a few books by Crowley, but not the Book of Wisdom and Folly. I might check it out sometime! :)