I sleep in the next morning, and then lazily make my way to a local cafe. It's Sunday and Russian Nob is bustling.

Even with all the crowds, I manage to score a seat outside at the cafe in my nabe. Instead of bringing my laptop, I just brought a pen and paper. I want to look at the app that Kat sent and make notes on functionality.

I look at the link on my phone and am initially impressed. The app is just a web app for now, part of the Librarian Detective website, but it looks good. It maps out all the crime scenes. Kat must be reading my blog.

She's got it all covered — the bar, the computer store, the street outside the library, the science museum in the park, the bars in the Mission, even Baker Beach.

I see all the coordinates, mapping each locat...

Please subscribe to keep reading.