A 200 page tome filled with questionable arguments for the veracity of his religion written by my grandfather after he got cancer. I did give it a chance and read through large portions of it (minus a large section on a theory he had regarding the location of the mythical events in the religion). It was… Unfortunately poor.

Then it was a balance of not trying to tear apart one of his proudest pieces of work and not pretend I believed it until he passed away.

Yes, for those guessing - - I grew up Mormon and that is the religion in question.