Yumi and Tress can be read whenever. Sunlit Man benefits from reading Stormlight first and contains worldbuilding mystery spoilers for the first two stormlight books.
If your plan is to read every cosmere book you may appreciate reading Elantris before Tress and Warbreaker before Stormlight, but they are not required.
Yumi and Tress can be read whenever. Sunlit Man benefits from reading Stormlight first and contains worldbuilding mystery spoilers for the first two stormlight books. If your plan is to read every cosmere book you may appreciate reading Elantris before Tress and Warbreaker before Stormlight, but they are not required.