Depends on what you're looking to get out of it but it could definitely be helpful. If you have a specific focus you can probably find a book that better expands on that specific topic. The books three titled sections are Work, Love, The Brain and the Body.

A lot of the principles outlined in the book are basically around the concept that you should learn these going into your 20's and apply them right away instead of applying them in your 30's from what I remember. It's been a few years since I've read the book though so I might be a little off.

I'm happy to give other suggestions as best I can if you're curious.

In many ways I'm still in my teens (I'm in my 40s), and finding more ways to grow up into adulthood, and have found books targeted to teens to be helpful in this.