Knowing how to learn a language is a key issue in the success of learning a second language; and given the importance of the role played by the learner in the success or failure to learn a language, the field of teaching languages has witnessed considerable attention and remarkable focus on the learner and how to provide him with the right insights and curricula to understand the language, know how to learn it, and use the strategies that could help him to do so, and this is what it tried to be provided by the book "How to learn a second language?" through a direct, simplified and youth-oriented manner, seeking to shortcut experiences.