salut
a. I think this book May be about young people and social media because on the cover we can see clearly that both teenagers are looking their smartphone and laptop.
2. with this summary " the youth power" I think I was on the right way.
3. The new generation are known for being constantly on social media and I think this book meant to show all the good things we can do with all these technologies.
j'espère t'avoir aidé !!!