The following links will take you to the lesson textbooks. Each text book serves to give you an overview of the topic, but not to serve as means of learning the content in and of itself. In-game lessons will be taught by certified teachers) lesson times being available here) who will take you more user-specific explanations as to better teach you the content. You need to have an account on the wiki before attending a lesson as it requires you edit your userspace (you would get nothing out of the lesson otherwise, and only those with accounts are permitted to create userpages).