* Someone releases a book, and it falls to the ground: This is a simple scenario where someone lets go of a book, and due to gravity, it falls to the ground.
* A book is released (as in published) and falls to the ground: This is a metaphorical way of saying a book is not successful and doesn't get much attention.
* A book is released from something, and falls to the ground: This could refer to a book being released from a shelf, a bag, or some other object and then falling to the ground.
To understand the meaning better, I need more context. Can you please provide more information about what you're asking? For example:
* Who is releasing the book?
* What is the book being released from?
* What is the context of the situation?
Once I have more information, I can give you a more accurate and helpful answer.