Dead Men Don't Flip, the third in the Martin & Owen series by Nina Cordoba. The actually mysteries aren't bad but the will they/won't they relationship of the leads is getting very tedious, very fast, I don't see myself trying the fourth, if there is one. Plus, what "serious geek" chooses Bing over Google (a running theme of book 2)? Going with DuckDuckGo or Wolfram Alpha may have sold it better than
BING