This is book 9 in this series Templars in America.
Historians Cameron Thorne and Amanda Spencer-Gunn uncover a stolen painting which the Nazis believed was a secret map to the Holy Grail and the lost treasure of the Knights Templar. Hitler planned to weaponize the Holy Grail and monetize the treasure as part of his campaign of world dominance. Cam and Amanda just want to find the legendary artifacts. The Nazis failed because they were unable to decipher the secret Templar clues left in the painting. Cam and Amanda may failperhaps fatallybecause a group of modern-day Nazis remain obsessed with finishing Hitlers work.
A thriller based on actual artwork, artifacts and events. Illustrated. Not recommended for readers with strong religious beliefs.
I also found out that this book is actually part of another series by this author. So many books, so little time The other series is Boston Law.
My book club is going to discuss Persuasion by Jane Austen. We meet at the end of the week, so I will probably put Templars aside and read a classic.