According to Adventure #337, the people of Uranus use micro-disks as books.

Where do they keep them?

Some were kept at LSHQ.

What do they use as bookmarks?

Electrons?

Well...microbookmarks of course.

What do they read on Uranus? Why toilet paper of course!

(Sorry )

I never thought to ask

NEXT TIME i get the opportunity, I will

Is Moby Dick popular on Uranus?

Don't get me started...

Just don't...