The Sunlit Man

 The Sunlit Man by Brandon Sanderson, 447 pages.

Nomad has been running from planet to planet for decades, fleeing the extremely persistent forces that want to use him to find the universe-altering power he gave away. He arrives on the latest planet, almost completely drained of the energy that powers his magic, and it is more terrible than average. Every day the sun melts anything in it's path, including the landscape. So the people here live in hovering island cities cobbled together out of ships, desperately fleeing both the sun and the planet's burgeoning tyrant. Nomad has made it his policy not to care, for his own safety and theirs, but the longer he spends here the more he remembers the oaths he once swore, and the less he can stand non-involvement. 

This is the last of Sanderson's year of secret projects, and he describes this book as being dedicated to the dedicated fans of his Cosmere universe, and it definitely reads as a love letter to those fans. The book is technically a stand alone, but get deeper and more nuanced the more of his other books you have read. I wouldn't necessarily recommend this book for everyone, but for Cosmere fans it's a must read. I would especially recommend it for fans of the Stormlight Archives, because it feels very thematically linked. This is a dark and action-packed book that is also absolutely full of lore for how the universe works. Overall, a very neat book.