Your dream presents a vivid and imaginative scenario that can be interpreted in several ways.

1. Exploration of Knowledge: The ancient library symbolizes a deep thirst for knowledge and wisdom, suggesting that you may be on a quest for understanding in your waking life. The glowing books represent insights or ideas that are enlightening but perhaps feel out of reach.
2. Unique Perspective: The fact that the books are written by fish and the fish wear reading glasses indicates a perspective that is different from the norm. This could suggest that you are encouraged to look at situations from a unique angle or to explore unconventional sources of knowledge.
3. Authority and Learning: The stern octopus librarian may represent authority figures in your life or your inner critic, reminding you that knowledge comes at a cost and requires effort and discipline. The slap on your hand suggests that you might be feeling restricted or challenged when it comes to pursuing your interests.
4. Earning Knowledge: The broom symbolizes hard work and the idea that you need to put in effort to gain the rewards you seek. This could be a call to take on new responsibilities or tasks that will lead to personal growth.
5. Imaginary Broom Handle: Waking up with the sensation of holding an imaginary broom handle indicates that this dream is resonating with you on a deeper level, suggesting that the call to action is significant. It might represent a readiness to clean up or organize aspects of your life in pursuit of knowledge.

Overall, this dream encourages you to embrace learning, consider different perspectives, and recognize that gaining wisdom often requires effort and dedication. Reflect on areas in your life where you can apply this interpretation and take actionable steps towards your goals.