This has been bothering me. I've been over and over it and I might have just missed something about the book of omens and plot in general. Anyway, this has three parts to consider. 1. Cheetara explains early on that the clerics hid the book of omens after discovering it was too much power for just one species to wield. Okay, here's the beginning of the problem. The King dispatched Panthro and Grune to find the book because he "believes it exists". Wait, Cheetara explained that the cats HAD the book at one point in history. Why is its existence even in question? How did (most of) the cats forget? The cats have recorded their history as it would seem, so it's unlikely that they would just forget that they once had this powerful artifact they wish to have back. 2. Jaga, as head cleric, knows the book's location. So why did he not reveal it to the king? Why didn't any of the head clerics reveal its location to their king? Sure, it would make sense that he would intentionally keep it secret due to the books power and past history, but if he would have just told the king where the book was, Mumm-Ra would have never been a problem. I suppose that may be exactly WHY he didn't reveal it. Because the writers wouldn't have a story. However, Lion-O does question why Jaga wouldn't say where the book was if he knew. 3. Here's where I think there is a real problem: Mumm-Ra. Mumm-Ra has been imprisoned in his sarcophagus for a very, very long time; since the animals arrived on 3rd Earth. Now, explain to me how Mumm-Ra knows that Jaga knows where the book is? How does he know the clerics tradition of passing down the location to the head cleric? It is unlikely that this fact would be written down as it is a secret. How is it, that the only guy who has been locked away for the entire history of 3rd Earth is the ONLY one who knows that Jaga knows the books location despite having been locked up for all of Thundera's history? It's like he knows Thundercat culture better than the Thundercats. Short version: If the cats had the book and they are the ones who hid it, why does just about everyone think the book is a myth? Also, how does Mumm-Ra know that the head cleric will know the books location despite being banished to his Tomb for all of 3rd Earth's history? Maybe I missed something, but I don't feel like rewatching again at the moment. After all, if you look too hard you can miss what is right in front of you.