I'm not a teen, nor do I work with them or know any in person, and have no interest in being a minimalist...so why would I read this? I dunno, it was slender and brightly colored and when I passed it on display at the library it said "take me home!" Who would ignore a talking book, right?
OK, the real answer is that apart from its physical beauty (love glossy pages! which, amusingly, does not seem like a very minimalist style of production), sometimes I just like to pretend for a few minutes that I am but a simple teenager again, with only one room's worth of possessions to consider, and time to focus on personal growth and habits without having to earn a living or run a household. And for some reason I have a lot to say about this average read, so buckle up.
The downside is that it starts with a history of minimalism and why it's good for the planet, focusing mainly on climate change and generally being such a bummer that I almost quit before I got to the good stuff. Maybe that's helpful to teens who don't already know about this, but on the other hand, do they really need more reasons to be depressed about the state of the world/feel like the best solution is actually to just die ASAP? Both for the planet and to avoid the depressing reality that no matter what changes YOU make, odds are the majority of people aren't going to follow suit and all these terrible, wasteful and/or pollution-producing industries will continue to exist.
Once you get past that, though, there's fun stuff. I enjoyed the brief interviews with minimalist bloggers, tips for secondhand shopping, ideas for designing a room, curating your wardrobe, giving gifts other than objects, and my favorite of all -- "minimalism for the maximalist," or how to ensure that if you don't want to pare down your possessions, you at least get use out of all of them and genuinely enjoy what you own. The 2nd half of the book is divided into how to incorporate the title philosophy into "stuff you buy," "stuff you use," and "living simply as a life philosophy," in very digestible tidbits.
There's also one really great picture on page 38 of a guy working at a cluttered desk in the messiest room you've ever seen in your life (you can't even see the floor beneath of blizzard of papers and discarded items) that I guarantee you will inspire some cleaning motivation.