Project Integration Management is the glue that holds the parts of your project together. It’s a discipline common to all project management methodologies.
The role of the project manager is a big one, with lots of things you need to do. So, do you fully understand the scope of your role & its responsibilities?
The APM Body of Knowledge (APMBoK) is the fundamental resource book for the Association for Project Management. The APM has published the new 7th Edition.