Fred Sawyer est le président de la North America Sundial Society: il nous informe que:
The Sciatherics series of books is a collection of (almost) all of Fred Sawyer's writings on Dialing. There are currently 8 volumes available, with the latest being dedicated to the life and work of Hugo Michnik, the inventor of the bifilar sundial.
Note that orders placed by Friday, November 24 qualify for a 30% discount directly from the printer/distributor if you use coupon code EXCLUSIVE30 .
The books may be purchased at:
https://bit.ly/SciathericsP (paperback)
https://bit.ly/SciathericsH (hardcover)