All images from the LOTR Fanclub Scrapbook outstanding cover gallery. Their collection is exhaustive (literally), so we’ve cherry-picked for you. Enjoy!
The original 1935 first edition of The Hobbit, featuring Tolkien’s own artwork and design
More of Tolkien’s own art and design
Watercolors by–you guessed it–Tolkien
These Polish editions are, um, kinda freaky
Happy fun times
There’s a certain Where the Wild Things Are quality to this one
According to the cover gallery site, this 1977 edition was the first Hebrew translation of The Hobbit, the work of Israeli air pilots passing time while imprisoned in Egypt. Art by Tolkien hisself.