Son Of Neptune
A mythological book by Rick Riordian
"A half a mile away stood Hubbard Glacier. Even Hazel, who'd seen glaciers before, couldn't process what she was looking at. Purple snowcapped mountains marched off in either direction, with clouds floating around their middles like fluffy belts. In a massive valley between two of the largest peaks, a ragged wall of ice rose out of the sea, filling the entire gorge. The glacier was blue and white with streaks of black, so that it looked like a hedge of dirty snow left behind on a sidewalk after the snowplow had gone by, only four million times as large."