Oh that's not even slightly good.
Keltham keeps his face neutral through all presented spells.
Detect Magic - maybe useful for learning wizard spells, not just seeing invisible things, which, maybe.
Read Magic - weakly confirms that his patron might have been giving him useful boosts for learning wizard things.
Guidance - super useful generally, why does anybody ever not do this.
Resistance - there are not that many cantrips so maybe Keltham should not be too alarmed that Resistance was included, it could be useful for learning wizardry without hurting yourself. It could've been worse, could've been Detect Poison.
Comprehend Languages - Keltham will see if he runs into anybody important who doesn't speak Taldane, later today; if not, it could be a hint that he should find somebody who doesn't speak Taldane. Or a hint not to rely on Carissa's Share Language.
Fairness - exactly what Keltham wanted and he's still surprised that a first-circle spell like this actually exists. Possibly reassuring; if Keltham's god had wanted him not to deal with these people at all, maybe this one wouldn't be included? Or maybe Fairness says 'they're screwing you' and if Keltham's god had deliberately not included Fairness, Keltham would have no way of knowing that spell existed to be otherwise included. It also shows that Keltham's god was paying sufficient attention to customize spells at all, and that this isn't just a random assortment.
Sanctuary is unambiguously a huge fucking warning.
And it would have been really nice if the book had included all of Keltham's spells, which would make it that much less likely that he was being shown books on which Selectively Omit Pages had been cast.
Keltham thinks about this, but not for very long. He's already withholding identifications of all his spells; that already tells them that Keltham is not just wandering around in blind unsuspecting innocence. And if his hosts are not the primary problem, letting them go in blind innocence themselves is foolish, and ungrateful.
"Unfortunately. My god seems to think I might need Sanctuary."