Enjoy the cover art! This was one of the books in the 1968 list of sf that I included in one of my home-made magazines just before I his the teen years. I'd forgotten that I'd read it till I saw the list recently. Even then the title seemed juvenile to me, but I liked the novel very much...
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The cat is Tess, whom we reckon turns 2 years old this month. She was born to a "barn cat" -- more precisely, a cat living in a shed with an open side, where odds and ends of farm-type equipment were stored.