When I was 8 or so, I found that book in our tiny local library and thought it was just so awesome it blew my mind. I always remembered it fondly. Years later, when I’d read some other books by Sleator like The Duplicate, The Boy Who Reversed Himself, Interstellar Pig, Singularity, and others, I happened to look up that old The Green Futures of Tycho book I had read as a kid and discovered that HEY! It was written by William Sleator! Wow! No wonder it was so good!
It’s great fun when that kind of thing happens.