This is one of my favourite books, probably because I read it as a baby adult and in formed much of my thinking and the person I am today.
The timeless story of Jonathan Livingston Seagull, a seagull bored with the daily squabbles over food. Seized by a passion for flight, he pushes himself, learning everything he can about flying, until finally his unwillingness to conform results in his expulsion from his flock.
An outcast, he continues to learn, becoming increasingly pleased with his abilities as he leads a peaceful and happy life.