This bookshelf item actually has two versions, with the in-game dialogue version being written differently.

To Treasure Hunters: (I)

Ha! You are fooled!
There is no “treasure” at all.
The only reward is the four scrawls by me hidden in this room. You must have recognized it.
Yes, Madam Herta's likeness is in there as well. Surprised, eh?
If you are a junior who worries all day to impress your boss, take a deep breath! No good if you have a heart attack now!
If you are one of those playful young fellows, I'd suggest you take them, go back to them when you find life miserable and have a good laugh when you are not busy doing your research in a dark corner of the ivory tower.

Laughing Hosea Lazaro

To Treasure Hunters: (II)

Right, if you are reading this, you've probably listened to me. That means you always follow through with what you started.
I have to admit, it would hurt my reputation had I asked you to go through so much for nothing.
After all, I can't foresee to whom this letter will go so many Amber Eras later.
There is a chance, however unlikely it may be, that you are a future defender of my reputation, someone worthy of my legacy.
Wouldn't want to accidentally put you under friendly fire, would I?
Hm, so be it. It's time that I bring forward the real treasure.

Your Respected Hosea Lazaro