Paul Weimer recently had a review of Planet of Exile at Skiffy & Fanty: https://skiffyandfanty.com/blogposts/blogseries/miningthegenreasteroid/planetofexile/
I love that early Le Guin story and I wanted to find my copy. I’d mentioned the odd version I had back when I wrote about Le Guin just after she died. However, I can see I misremembered some things about it. I said that it was a US edition but it isn’t. It is clearly priced in pounds and for the UK/Australia (and Malta!) market. Other things are true though. It was an odd size and it was a two-for-one version with Rocannon’s World. I think it was the cover art that made me remember it as being an American.
The back cover is very British and also pitched at respectability with quotes from The Times and The Observer about how important Le Guin is. Whereas the cover is all pew-pew-flying-saucer-spearmen-yeah!
The imprint is “Star”. I can’t say that is familiar but it was ‘The paperback division of W.H.Allen’. https://en.wikipedia.org/wiki/W.H._Allen%26_Co.
Together with City of Illusions, these books form a sort of trilogy of stories set in Le Guin’s Hainish universe but in the timeline chronologically after most of her later stories*. The connecting theme is a war or conflict with an unusual enemy whose actions form part of the background to the first two books and who are revealed in City of Illusions. The story of that war/conflict is not something Le Guin ever returned to, so the three books form a partial narrative of fictional events.
Anyway, this copy has somehow managed to work it’s way over three continents with me.
*[Maybe. The Lefthand of Darkness can be read as being later than all three and is clearly after Rocannon’s World or (more credibly) Le Guin didn’t expect the books to have a consistent history.]