The Laneway Code. The CodeBreakers, #1

Someone painted a secret in the city. When a massive mural of a wedge-tailed eagle appears overnight on their school wall, Zara Mitchell knows two things: it wasn't there yesterday, and someone went to a lot of trouble to make sure everyone would be looking at it. Because while the whole city talks about the eagle, nobody is looking at the second mural - hidden in a Fringe Festival laneway, carrying a coded message at its base that points deep into Adelaide's forgotten underground.
With the Adelaide Fringe in full swing and the clock ticking, Zara, Ollie, Priya, Mack, and Gypsy the cocker spaniel have three weeks to decode a message, follow a trail through drain tunnels beneath the CBD, and expose a crime hiding in plain sight. The question isn't just what the code means. It's who needed someone to find it.