Answer:
Its title means book.
Only one color, but not one size. Stuck at the bottom, yet easily flies. Present in sun, but not in rain. Doing no harm, and feeling no pain.
What is that over the head and under the hat?
What flies without wings?
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
When is it bad luck to see a black cat?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?