There are a lot of books out there about time management. I have read quite a few of them and here is the list that I found most useful with my self and my coaching clients.
Essentialism - The Disciplined Pursuit of Less
This is first on the list because you must know what is essential and what is not. Without this essential first step, you will not be able to manage your time properly.
The 80/20 Principle by Richard Koch
Then you can use the 80/20 rule to prioritize your task list.
and then use the tips and techniques in the books below.
Eat That Frog! by Brian Tracy
Deep Work by Cal Newport
Getting Things Done by David Allen
Hope this helps
Founder at WP Spell Check