Mammoth Academy: Surf's Up! by Neal Layton
Hodder Children's Books ISBN 9780340989678
Oscar and Arabella start the new year at the Mammoth Academy with some new students, two pygmy mammoths. They come from a different part of the Mammoth Lands and are not familiar with snow or skiing. They are cool surf dudes! When news arrives that their island is under threat - possibly from humans - the new friends set out on a rescue mission to the faraway island.