Hmmm. More like reading it silently. So not stopping them from doing their thing but pointedly doing the opposite. But a better book would be 'The God Delusion' as most Christians except evolution. Also, at work rather than at a family dinner is a better fit. I'd support bothhttps://twitter.com/Ramcgreg/status/999804165013426176 …
I suppose they could miss it if it was a big table or everyone else had their eyes closed. Maybe reading quietly then so they can still say Grace. It;s not an obstructive protest but a visible one.