Spellbooks with unspecified elements?

[Lormyr]

I have noticed that in some PFS legal adventure paths and modules, captured enemy spellbooks sometimes contain unspecified or random elements. Example:

Shattered Star Adventure Path, Beyond the Doomsday Door:

In area D5, when Zolerim is defeated his spellbook is easily located. It contains, and I quote, "all his prepared wizard spells plus 2d4 other spells from level 1st to 5th of your choice."

In cases such as this, what is the legal PFS response to determining what these unspecified spells are? We just ran this last night and my wizard is dying to know if these extras are salvageable in any capacity.

[Robert A Matthews]

It says your choice. Whatever you do to decide what the spells are should work IMO. If you wanted you could let him decide, or you could pick all level 1 spells that he already has, or you could roll on the scroll tables in the Game Mastery Guide. It doesn't seem like it should matter how you pick, since the AP is sanctioned.

[Lormyr]

That was our leaning as well. We just wanted to seek some confirmation, as most things written specifically for PFS do not include the use of personal discretion for assigning items of any kind.