Lead-Pipe Cinch (Georgiana Neverall Series #2) in Bloomington, MN

The second mystery featuring Georgiana Neverall, plumber's apprentice extraordinaire.
Georgiana Neverall never pictured herself knee-deep in a muddy trench building a moat-part of a state-of-the-art castle that would soon house a retired Microsoft engineer.
She also never imagined being a murder suspect, but that's exactly what happens when a floater in the moat turns out to be her ex-boyfriend.