book cover of How Firm a Foundation
 

How Firm a Foundation

(2026)
(The third book in the Penrose Mystery series)
A novel by

 
 
When the church floor collapsed, Penrose discovered it had been standing on a secret.

Beneath the ruined sanctuary lies a hidden crypt no one living remembers, a dead man no one expected, and a sealed history the town was never meant to uncover. When Ari Penrose and the Penrose Five begin asking why Martin Calder came back to town, they find more than old church records. They uncover a forgotten tunnel, a missing Covenant, and generations of fear buried beneath the foundations of St. Mark’s.

But Calder did not find what he was searching for.

Someone else is still looking.

As rumors spread through Second Act Café and suspicion turns toward Penrose’s oldest families, Ari and Sophia follow the clues into the crypt itself—where the truth waits in a hidden niche.

And when it is finally found, someone is willing to kill to keep it buried.


Genre: Mystery

Used availability for J Jasper North's How Firm a Foundation


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