Ah… Jules Verne…
These covers would be perfect for a Steampunk project.
Note: most of these fit the cover of the ATC Sized Faux Book Box (a bit larger than an ATC, but they could also be cropped for using on ATCs). See below for a couple more collage sheets with faux book covers for the same book box.
Jules Verne ATC Book Covers Collage Sheet steampunk voyage 20,000 leagues travel moon center of the earth sea Extraordinaires