What Is a Literary Agent and What do They Do?

The role of literary agents has changed, like that of other actors in the book production chain. Agents have taken on some responsibilities previously in the hands of publishers, such as receiving manuscripts and publishing works, as well as the traditional tasks of the bookseller, such as reader contact, not forgetting the promotion of books and authors. Today, with their new skills and competences, what exactly is a literary agent, and what do they do?