This tour delivered exactly what was promised: a darker side of Parisian history. Zac is incredibly knowledgeable and very articulate in English. The tour consists of stops throughout the right bank. At each he paints a picture of what the scene would be like where his stories take place. He also has many pictures to supplement. He was very polite and concerned with our comfort, offering us to sit while he stood and offering his umbrella when it began to drizzle. Great tour, if we had more time we would have booked him for another part of Paris but honestly a 'spooky' tour was our priority.