The problem with trying to read a book of short stories is that, if they are good, you need to stop after every story and process it and then you end up taking way longer than you expected.
Tiptree is brilliant! I'd say I can't believe I haven't read her before, but given how I basically skipped the entire golden age of sf, it's not all that surprising. But she's so good. Her stories lean towards the tragic and beautiful, and they get...odder over time, but I'm so glad I got to read her and can't wait to teach her this summer.