Hobbitvs Ille (Latin [H]), purchased on-line from Amazon in 2018 (hardback)
Tolkien, J.R.R. Hobbitvs Ille, aut illuc atque rursus retrorsum. Translated by Mark Walker. HarperCollins Publishers, 2012. ISBN: 978-0-00-744521-9
This was the first edition of Hobbit that I bought without there being a translation of LOTR in the same language. I bought it because, well, Latin. It looks lovingly from my Tolkien bookshelves across the room to its distant cousin on another shelf, Cattus Petasatus.