Drinks and Sinkholes - Evans S. Usher

Bev may not know who she was before she showed up in the quaint village of Pigsend five years ago, but that doesn't bother her much. She's made a tidy little life for herself as the proprietor of the Weary Dragon Inn, where the most notable event is when she makes her famous rosemary bread. 

But when earthquakes and sinkholes start appearing all over town, including near Bev's front door, she's got to put on her sleuthing hat to figure out what-or who-might be causing them before the entire town disappears. 

Drinks and Sinkholes is the first book in the Weary Dragon Inn Series.