Over at OEDb (Online Education Database) they have an article about the 50 Books that changed the world. Among them are:
1984 by George Orwell
Harry Potter and the Philosopher's Stone by JK Rowling
Diary of a Young Girl by Anne Frank
In the article they have the top 50 split into categories:
Politics & Government
Science, Math, and Geography
What books would you choose to put in each category?