Maintaining Story Structure

Story Structure and development is one of my favourite aspects of writing. I love the planning and plotting tat goes into creating and telling a good story. There has been plenty of both with the Titan series long before the first book even came out. Right now I am in the first draft of book 3 and still finding my self rearranging parts of the story so that they fall in line better for structure and flow and the development of my story and characters. I am finding with book three as it combines two of my previous Titan story lines that there is still some tweaking that needs to be done so that the story rolls out a certain way and works well structurally. So much happens in this book and I rally want it to make sure that I put all the pieces of both stories together so they overlap and fit together as perfectly as possible and make it seem so natural no one would ever doubt the two stories ever existed separately at all.