Emerald decision (Revised edition.)

A 40 year old mystery is stirred, and a new danger rises to the surface…

1940:

Anglo-Irish spy, Michael McBride, uncovers a secret that could cost him his life when he finds a hidden stash of Nazi submarines in Guernsey. With German agents suddenly appearing in Ireland, Nazi relations with Irish Republicans become apparent, and McBride suspects an invasion may be imminent.

1980:

Forty years on, the war is long over, and the German submarine mystery is a secret that remains untouched. However, when McBride's son, a bestselling American author, starts to dig into his father's history, valuable details of the Irish invasion - codenamed Emerald Necklace - come to light, risking the lives of everyone involved.

One secret, two stories, and forty years between them, Emerald Decision is a gripping political thriller, perfect for fans of Tom Clancy and Brad Thor.