Running Wild by Morpurgo, Michael (2010) Paperback

An epic and heart-rending jungle adventure from the bestselling author of Kaspar and Born to Run. For Will and his mother, going to Indonesia isn't just a holiday. It's an escape, a new start, a chance to put things behind them - things like the death of Will's father. And to begin with, it seems to be just what they both needed. But then Oona, the elephant Will is riding on the beach, begins acting strangely, shying away from the sea. And that's when the tsunami comes crashing in, and Oona begins to run. Except that when the tsunami is gone, Oona just keeps on running. With nothing on his back but a shirt and nothing to sustain him but a bottle of water, Will must learn to survive deep in the jungle. Luckily, though, he's not completely alone! He's got Oona.