If the "books" wasn't a plural, it would be "his" but since it isn't singular, it would be "their"
Although we as the readers see how furious and proud of their beliefs both factions are, we see that they are arguing over something that is the same thing. Similar to arguing whether zebras are white with black stripes or black with white stripes.
Yes, because the government needs a change, along with many social standards we have today
Ok, so now Leah has to go back to the bus and claim her purse.