Marco Borges—author, exercise physiologist, and longtime personal trainer for Beyoncé—has published a new book titled, The Greenprint: Plant-Based Diet, Best Body, Better World. A book of recipes and lifestyle guidelines, The Greenprint comes with an introduction penned by Beyoncé and husband JAY-Z.

“Having children has changed our lives more than anything else,” they wrote, according to People. “We used to think of health as a diet—some worked for us, some didn’t. Once we looked at health as the truth, instead of a diet, it became a mission for us to share that truth and lifestyle with as many people as possible.”

Read our feature, “Why Beyoncé’s Coachella Performance Was One for the Ages.”