Who is Gustav Mahler ? The life and works of the great Austrian composer and conductor told to young readers.During a walk in the heart of Vienna, the extraordinary story of Mahler unfolds through the dialogue between a father and his daughter, a young girl with a special name. The narrative presents the key events, the main figures and places, the distinctive personality traits, and the curiosities surrounding this musical genius.In language suitable for younger readers, the book also describes all of Gustav Mahler's principal compositions: his 10 symphonies and "The Song of the Earth".QR codes inserted throughout the text and linked to online musical resources - mainly by international youth orchestras - invite readers to listen.The book also includes simple educational games, as well as a personal "Mahler Diary," where children can record their auditory experiences and emotions.The aim of this volume is to introduce the new generations to the gift that Gustav Mahler's music can offer, inspiring especially those who have not yet listened to (or played) it.With the hope that their lives, too, may be enriched by the "MAHLER EFFECT."