I love finding embossed images underneath book jackets that are very different from their paper jackets.
The Night Circus jacket
The Night Circus cover
Jo's Boys jacket
Jo's Boys cover
Exploring the Deep Frontier Cover
(The reused the jacket for some art)
The World's Whales cover
(Jacket was in bad shape)
I don't know if these books ever had jackets but they are amazing on their own.
