In the Company of Others, by Jan Karon

In this second "Father Tim novel", Father Tim & Cynthia Kavanaugh travel to Ireland for a couple weeks' relaxation and sightseeing in Ireland.  Cynthia, recently recovered from a broken ankle, re-injures it; so is unable to do much sightseeing; but the two of them enjoy the owners of the bed & breakfast in which they are staying, and have plenty of time to read an 1860's journal written by former owners.  A valuable painting disappears, there is family trouble, an older relative of the inn owners (long an alcoholic) undergoes a long and strenuous "detox"... in all, lots of action.

I missed the "family" with whom I'd become familiar in previous books; but gained another interesting Irish family!