Anyone familiar with Brandon Sanderson books? He is one of my favourite epic fantasy writers. He is very prolific and has created his own universe, the Cosmere, with multiple book series. His world building and magic systems are quite impressive. I've read most of his books and really loved each one of them.

The Stormlight Archive series is my favourite and the fourth book was just released a few days ago. My copy will be arriving tomorrow and I really can't wait to start reading.