Bet you didn't see this one coming

This Ephemeris news site never ceases to amaze me.

Though it may be in an unfamiliar language, I invite readers (particularly the ladies, who may be more familiar with the original) to try to figure out or guess what book this is from its famous first line before clicking the link and seeing what it is (here's a dictionary if you need some help).

Verum est ubique agnotum quo plus caelebs locuples uxore careat.

Here's the link.