Seal Dwidakiss on June 15, 2020 at 11:06 am Idea: Spherical CowsLink: https://www.amazon.co.uk/Consi... This one too – about environmental problem solving, still interesting to physicists though. Highly recommended. Consider A Spherical Cow: A Course in Environmental Problem Solving Link: https://www.amazon.co.uk Buy Consider A Spherical Cow: A Course in Environmental Problem Solving 1991 by Harte, John (ISBN: 9780935702583) from Amazon’s Book Store. Everyday low prices and free delivery on eligible orders.