The Donegal Cipher: A George Ryan Archaeological Thriller - Book 3

By Cathal Flynn-Post

The Donegal Cipher

An Archaeological Thriller by Cathal Flynn-Post

Ireland's rugged northwest hides more than crashing waves and ancient stones, it holds a secret that could rewrite the island's history.

When ine O'Neill discovers that her father's murder is tied to a centuries-old code, she and her boyfriend George 'Seoirse' Ryan are thrust into a dangerous pursuit stretching from Donegal's dolmens to the red cliffs of the Isle of Man. Alongside old friends Jasminder 'Jazz' Grewal, Professor Irene Dobson, and new allies like the enigmatic Shuggy O'Donnell, they unravel a hidden chain of evidence left by Irish rebels who once fought for sovereignty against the Crown.

What they uncover is no mere relic: a cipher wheel, manuscripts, and buried letters that reveal a roadmap laid down during the Nine Years' War, a plan for a free Ireland that secret societies like The Order will kill to suppress.

As assassins close in and family loyalties are tested, the group must race to decode the final messages before The Order can erase them forever. From mist-shrouded glens to storm-lashed seas, The Donegal Cipher blends history, myth, and modern conspiracy into a gripping tale of legacy, resistance, and the enduring fight for identity.

Perfect for fans of Dan Brown, Steve Berry, and Kate Mosse-this third installment in the George Ryan Archaeological Thriller series is a fast-paced, atmospheric journey into Ireland's past and its dangerous echoes in the present.

• Format: Paperback
• Language: English
• ISBN: B0FRMRLQPF
• ISBN13: 9798265776693
• Release Date: October 2025
• Publisher: Independently Published
• Length: 210 Pages
• Weight: 0.63 lbs.
• Dimensions: 0.4" x 6.0" x 9.0"