The Five Obstructions is a book series about friendship and the power of limits in creativity. Lars von Trier set a challenge for his friend, director Jørgen Leth: to re-make his 1967 pseudo-anthropological short, "The Perfect Human", but with a certain number of obstructions in place. The main subject of the books is a dissertation about feelings and reactions of both directors, along with their conversations and a creative visual interpretation of each obstruction made using different elements like mirror sheets, transparent sheets, paint, typography. The Five Obstructions makes you want to think more deeply about the creative process, and how to experiment more with your own work.