Reading: a singular pleasure?

"Reading is an act of friendly isolation. When we are reading, we make ourselves unapproachable in a tactful way." Stefan Bollmann, Women who Read are Dangerous.

 

But:
"The pleasure of reading is doubled when one lives with another who shares the same books." Katherine Mansfield.

On the other hand:
"Books and marriage go ill together." (!) Molière.

Perhaps because:

"She is too fond of books and it has turned her brain." Louisa M. Alcott.