Suddenly, you realize there is something different about that person who you like so much, or even that something about you does not fit into normality. Initially, the difficulty to learn, to socialize or to perform daily tasks seems natural. As time goes on, however, these obstacles start to mount, making the person's life more painful, more stressful and more difficult than would be reasonable — a suffering that also affects the lives of the people who live with them. What may be happening? It was in order to clarify this and many other doubts that Dr. Paulo Mattos wrote Head in the clouds: 100 questions and answers about Attention Deficit Hyperactivity Disorder ( ADHD ). As a psychiatrist and researcher, Dr. Mattos is one of the world's leading authorities on ADHD , having published more than a hundred scientific articles, in addition to dozens of books and chapters on the topic. However, his main contribution to families living with ADHD has been, without a doubt, this book.