[PJ-Comix]

I’ve read Malachi Martin’s books (highly recommend)

There was one Malachi Martin book about the Vatican that was supposed to be especially good. Do you know which book?

[SkyPilot]

It might be Windswept House.

[RoosterRedux]

I don't know which book you might be thinking of because there are so many that involved the Vatican.

It might "The Vatican," "The Keys of this Blood," or perhaps "Windswept House."

I favor his books on the demonic.

Know thy enemy.

[SaraJohnson]

Windswept House