a book of language learning tips

For many decades people have been writing books about how to learn a new language. A book in this genre which I’m currently reading is Fluent Forever by Gabriel Wyner. (It was published in 2014.) There is an interesting summary and discussion of the book’s main points on Kris Wingo’s ESL Teaching Blog. You can learn more about the book and Wyner’s other products at fluent-forever.com