American Girl is out with a new book — this one’s for boys.

“Guy Stuff: The Body Book For Boys” tackles what boys need to know about their developing bodies and minds — from healthy eating, bad breath and shaving to moodiness and expressing emotions.

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It’s written by Dr. Cara Natterson, a pediatrician and author of American Girl’s “Care & Keeping of You” series. She’s also the mom of a 12-year-old son.

The book costs $12.99 at americangirl.com.