Guardians of the Holy Grail Books in Order

An expedition beneath the Temple Mount leads Dr. Laura Stevens to a Templar document connected with the Holy Grail. As powerful institutions pursue the discovery, she follows a trail across continents to uncover its guardians and secrets.

Working with Vatican treasure hunters, Laura Stevens and Sir Lancelot search for a lost Viking hoard. Their investigation takes them from Iceland to European cathedrals, where concealed motives turn the quest into a dangerous contest.

An underwater discovery draws Laura Stevens into a Vatican-backed expedition seeking Atlantis. As competing treasure hunters close in, she must navigate rival ambitions and unstable alliances while investigating the origins and implications of an ancient chest.

Laura Stevens joins a Vatican mission to recover Excalibur, accompanied by the immortal Lancelot. An unfinished quest and the return of an old enemy complicate their search, leading them toward a trap built around the legendary sword.

The Vatican sends Lancelot to destroy the Fountain of Youth in Florida, putting him at odds with Laura Stevens’ desire to preserve it. A young girl’s connection to him adds another complication as rival forces converge.

A nighttime attack on their Vatican headquarters scatters Laura Stevens and the Guardians of the Grail. Seeking to recover what Mordred stole, the survivors confront dangerous secrets about the relic that could divide their already battered group.

Laura Stevens searches Norwegian caves for the mistletoe arrow associated with Baldr’s death. Pursued by the Tartarus Society, she and her companions face rival claims to the relic while a conspiracy unfolds within the Vatican.