"The second volume set in Brandon Sanderson's sprawling Cosmere universe"--Page 4 of dust jacket.
Series3 primary books
White Sand is a 3-book series with 3 primary works first released in 2016 with contributions by Brandon Sanderson, Rik Hoskin, and Isaac Stewart.
Series29 released books
The Cosmere is a 29-book series first released in 2000 with contributions by Brandon Sanderson and Rik Hoskin.