You live in a country where English is readily available - some might say too readily available! - and where just turning on the television or your computer gives you a free English lesson.
There is a saying in English: "You can take a horse to water, but you can't make him drink." In other words, you can't learn a language without wanting to and without making an effort. The rewards for making this effort are enormous - much larger and more important than the grade you get at the end of the year. Learning a language is a bit like climbing a mountain - the higher you get, the wider the horizon is. And unlike climbing a mountain, there's no danger of breaking your neck!
We hope you will find the book and the supplementary website both interesting and fun.