Fantasy Book 3 update

Slowly working on fantasy book 3. The Tower at Tirumfall has been sealed for 10,000 years and legend says it holds the secrets to the most powerful magic ever. A mysterious key has appeared that might open that tower. Who will be able to use it and unlock the secrets within? Several people are determined to open the tower and not all of them are caring, humane individuals. More importantly, what will they do with that power and knowledge?  The fate of the world hangs in the balance.