Answer:
Sleeping during the day, I hide away. Watchful through the night, I open at dawn's light. But only for the briefest time, do I shine. And then I hide away. And sleep through the day.
My first half is normally made of stone, my second is crazy, and I taste sweet when complete.
What has a single eye but cannot see?
Though desert men once called me God, today men call me mad. For I wag my tail when I am angry. And growl when I am glad.
My life is often a volume of grief, your help is needed to turn a new leaf. Stiff is my spine and my body is pale. But I'm always ready to tell a tale.
I am your mother's brother's only brother in law. Who am I?