We try to normalize the variety of the human body goes through puberty and how there is no one right way.' 'We talk about how every body is different,' Lowe says, 'Breasts can come in all different shapes and sizes. Big feelings, big questions and growing faster or slower than other kids are all part of it. It explains body parts and how they change in clear, accessible ways, while assuring kids that there's a wide range to what is normal. The slim, 150-page guide, published Tuesday by the American Academy of Pediatrics, is one a handful of recent puberty books that aim to be more inclusive. They settled on You-ology: A Puberty Guide for Everybody. Kathryn Lowe, one of the book's three co-authors, who are all physicians and parents. Titles like 'Hello Hairy,' and 'The Rollercoaster Called Puberty' weren't cutting it, says Dr. It's inclusive of the gender spectrum and the trans experience. The guide to growing up, for pre-teens 9 to 13, is written for all kids – girls, boys, nonbinary youth. The authors of a new book on puberty had trouble coming up with a name. In an inclusive guide for pre-teens going through puberty, girls, boys and nonbinary youth are shown navigating topics from feelings to body parts to puberty gear.