Jonathan's Promise (Jonathan Trilogy #2)
Hans M. Hirschi

When their grandson Parker and his fiancé Cody move in with him, the three of them embark on a journey to shed light on Dan's roots.
A heart-warming sequel to Jonathan's Hope, Jonathan's Promise deals with aging and the ultimate consequences of wedding vows. Are we entitled to a second shot at happiness? When is 'for worse' too much to handle?
In this trilogy:
Jonathan's Hope (Book 1)
Jonathan's Promise (Book 2)
Jonathan's Legacy (Book 3)