The Isaac Question : Templars and the Secret of the Old Testament (Templars in America‪)‬

While rooting around in the mysterious stone chambers of New England, historian Cameron Thorne and his fiancée Amanda Spencer-Gunn stumble upon a reinterpretation of the Biblical passage calling on Abraham to sacrifice his son Isaac. It is a revelation—long suppressed by the medieval Knights Templar—that threatens to destabilize the Middle East forever. It is also a secret Cam and Amanda want nothing to do with.

Not that a rogue faction of puppeteering Freemasons gives a damn what Cam and Amanda want.