In Light on Leiden, Diana takes you by the hand to lead you through the streets of Leiden. She describes and shows us locations that she feels are of great interest to everyone. Diana shines her inhabitant’s light on Leiden. She describes buildings, streets, alleys, and events that she feels the reader should see. She interviews people who interest her. All the individual parts of this production have come together to paint a stunning picture of the city-of-keys, but it is not just for tourists. Light on Leiden is equally a book that the good people of Leiden can also learn from.