Essentialism is, well, an essential little book. It could be summed up as "less, but better". I liken it to The Lifechanging Magic of Tidying-Up for its inspiring but still very implementable message.
Author Greg McKeown offers insight and advice on how to change your entire mindset from scarcity and FOMO to determining what is essential for you and ruthlessly (but politely) carving out that which is not. Most of us, I think, are aware of when we are getting stretched too thin, and we can even identify the causes - bosses who pile on the work, friends and family whose feelings matter to us, an expansive desire to have it all. But we don't know how to deal with being pulled in all of these different directions in a way that allows us to keep our jobs, our relationships, and our contentment intact.
Essentialism answers those difficult questions and more. As a rallying cry, as a practical manual, as a manifesto, a call to action, and a muse, this one is highly recommended.
I got my copy from the library, but am keeping an eye out for a copy to own as well. Support your local library, indie bookseller, or brick-and-mortar bookstore!