Does anyone remember The Solar Cat Handbook? It was published back in 1979 by Jim Augustyn and was revised as The Return of the Solar Cat Book in 2003. These books describe how it is that cats have always known about and utilized solar energy far better, more efficiently, and more effectively than we do. Most all of our cats are Solar Cats – however Onyx has obviously studied Mr. Augustyn’s texts very carefully and is a particularly efficient heat sink. Smart Kitty Kitty.