Question

According to the preface, what is the main topic of The Pluto Files?

Answer 1

Pluto Files with its full name The Pluto Files: The Rise and Fall of America's Favorite Planet is a book written by American astrophysicist Neil De Grasse Tyson. From its full name, the answer is obvious, however in the opening paragraph of the preface author says that:

"Gathered here in one place is a record of Pluto’s rise and fall from planethood, given by way of media accounts, public forums, cartoons, and letters I received from disgruntled school children, their teachers, strongly opinionated adults, and colleagues."