The Templar Mission to Oak Island and Beyond: Search for Ancient Secrets: The Shocking Revelations of a 12th Century Manuscript https://www.amazon.com/dp/154474451X/ref=cm_sw_r_cp_api_glc_fabc_kuu-FbBD3RWJ5
https://www.amazon.com/Templar-Mission-Oak-Island-Beyond/dp/154474451X
It was actually published pretty recently in 2017. Shortly before Zena's death. What's the "and beyond" part?
https://www.amazon.com/Lost-Treasure-Knights-Templar-Solving/dp/0892817100/
I actually found this book in the dollar section of a used book store. I didn't buy it because it was outdated.