Where the Barnes & Noble sits the Detroit-Grosse Pointe Woods city line runs just outside the store on its north side. The street on the north side of the Barnes & Noble is the extension of Kingsville that is the divide between Detroit and Harper Woods as it runs from I-94 toward Mack. The boundary between said three cities does zigzag a bit in that area. I think the parking lot behind St. John Hospital sits mostly in GPW.
Perhaps someone can post a map of the city boundary at that corner.