You should put them in alphabetical order, but if there's a book series then you should keep it together.
Third person plural pronoun is THEY.
If you want to create a possessive pronoun out of that one, that would be THEIRS.
Possessive pronouns, as the name itself says, determine some kind of possession. For example:
Is this books yours? - No, it's theirs.
At the end of Resistance to Civil Government, he concludes that the American Government does not really promote democracy and only looks out for its own interests, which is why it must not be obeyed.
Fears operate through the imagination much like storytelling does, and we can learn from our fears just as we can learn from stories.
