I am looking for resources (books/lecture notes/survey papers/etc.) on advanced topics in algorithms (topics beyond what is covered in algorithms textbooks like CLRS or DPV). The type of material that can be used for a topics in algorithms course.

Resources that would give an overview of the field (like a handbook) are preferable, but
more focused resources (e.g. Vijay Vazirani's "Approximation Algorithms" book) are also fine.