What is the purpose of Trevize's search for Earth? What does he hope to find? Does he?

What are some of the myths regarding Earth? How is it that the records and documents regarding Earth are unavailable?

What was Pelorat's job prior to his joining Trevize? Why is that significant?

What are some of the differences of cultures Trevize and his party encounter? What credence does that lend to Trevize's argument that humans should remain individuals? What credence does it lend to Bliss's argument of the opposite, that humans should join Gaia?

Describe the makeup of Gaia. How does Bliss offer Pelorat a glance into the inner workings of the society? What impact does that have on Pelorat? Feeling as he does, why does he continue to travel with Trevize?

Describe some of the most notable characteristics of the planets Trevize encounters. What have...