1. How would you describe the character of our protagonist, Grace Lisa Vandenburg? Did your impressions of Grace change throughout the course of the novel?

2. Grace can be considered an unreliable narrator, though perhaps not willfully so. How do Grace's views on Jill, her mother and Seamus differ from the views you formed as an objective reader?

3. What parallels and differences did you discover between Grace's life and the life of her idol, Nikola Tesla?

4. Do you think the novel is successful in presenting the perspective of someone with Obsessive Compulsive Disorder? Has it changed your perception of the condition?

5. How is humor used in the novel?

6. How and why does the tone of the novel change when Grace is undergoing “treatment”?

7. On one level, Addition is a romantic comedy. How does it deviate from the typical romantic comedy?

8. Did the novel end the way you expected? Why or why not?

9. Is there a difference between eccentricity and insanity? Why or why not?

10. Addition is a celebration of small things. What does this mean? What small things might you celebrate in your own life?