In this tutorial, you will learn about GraphQL. You will learn about making queries, express app setup, setting up GraphQL, GraphQL schema, root query, the resolve() function, testing queries in GraphiQL, GraphQL ID type, author type, type relations, GraphQL lists, connecting to mLab, Mongoose models, mutations, updating the resolve() functions, GraphQL NonNull, adding a front-end, creating React app, book list component, Apollo client setup, making queries from React, rendering data in a component, adding book component, external query file, updating component state, composing queries, query variables, re-fetching queries, book details component, making a single query, styling the app, and much more.