His sympathy made tears spring to Lina's eyes. Doon looked startled for a moment, and then he took a step toward her and wrapped his arms around her. He gave her a squeeze so quick and tight that it made her cough, and then it made her laugh. She realized all at once that Doon - thin, dark-eyed Doon with his troublesome temper and his terrible brown jacket and his good heart - was the person that she knew better than anyone now. He was her best friend.
— The City of Ember
by Jeanne DuPrau