The 39 Clues - One False Note by Gordon Korman

I've only read four pages so far, but I'm going to summarise anyway because Mrs.Craig and Mrs.Franco are rushing me. So far, Amy and Dan are discussing a sheet music by Wolfgang Amadeus Mozart.

Now I've read a little more, and right now, Amy & Dan are in Tokyo, Japan because they think that's where the next clue is. They're going to the library with Alistair Oh, their uncle but also the competition in the hunt for the 39 clues. In the library, they search for tungsten swords and for ninja warriors to see if they can work out the 3rd clue. Meanwhile, their uncle finds out about a japanese Tomas ancestor called Toyotomi Hideyoshi, a.k.a The Bald Rat.Suddenly, Dan's laptop cursor moves and starts flicking through the pages. Someone hacked into Dan's computer! It was the Holts, another enemy. They took Amy, Dan and Alistair prisoner and took them to a Subway station. They want to search for a hidden clue. But a train is approaching ahead of schedule. The Holts manage to escape by running, but Amy and Dan nearly get run over and killed. Luckily, Alistair manages to throw them out of the trains way and save them.