Is the Necronomicon flammable?

I read a post about a CoC campaign, can’t find it now…

The post described a player who created a character who could read most human languages, then insisted it meant his character could read the Necronomicon, and when understandably denied this option, burned the book. At which point the Keeper had the ceiling drop on him, killing him for wrecking the campaign.

Forget that the player was trying to “win by loophole” rather than embrace the narrative. I would have claimed that the arcane writings of the Necronomicon, even a copy, protect themselves from tawdry human attempts at combustion.

I ask this community, far more experienced than myself - would you allow a player to burn a copy of the Necronomicon and if so, what would be your consequences beyond a pile of ash?