Summary

SAPPHIREBEAR15
Dan and Amy head to Sydney, Australia to learn about what their parents knew about the 39 Clues from their dad's cousin, Sheppard Trent. They discover that Ian and Natalie's mother, Isabel Kabra, has joined the hunt. Isabel hunts the two down to kill them, but the siblings escape and follow a clue to Krakatau (the ring of fire), where they meet Alistair. Isabel sets fire to their hut. Irina Spasky dies while saving Amy, Dan and Alistair. After the fire, the three look in Irina's bag and find song lyrics, revealing the clue, water. At the end of the book, they start to suspect that Nellie spies on them for someone else.