When boys reach puberty, everything changes: in their bodies, in their emotions, and in their relationships. Their world seems to turn upside down, and it happens at the exact time when it is most difficult for them to talk about things, especially with adults. But even if they don't speak out loud about what they think, they will still want direct answers - and as accurate as possible. The big book for boys provides children aged 9-10 and older with a readable, relaxing and entertaining guide with its illustrations. In the book, the boys will find answers and information in many areas: hygiene, physical activity, getting along with teachers, social situations, relationships within the family and more. They will learn about what happens physically to their bodies (changes in voice, hair in new places), about how to deal with academic pressures and explosive emotions, and also about how to make new friends and how to keep them safe - both online and in the real world.