These books provide information about such topics as the language, culture, food and history of a given country.

As it happened, another person was writing about the same topic.

The better your English language skills, the more you are able to talk about difficult topics.

I don't think James will be any help on this; he doesn't know anything about the topic.

Information is a collection of related data or knowledge about a topic.

If necessary, start by asking for a list of the information available about the topic.

"No one had written anything about the topic in 50 years, much less tried to make it a reality."

Are you clear about the topic that is under discussion?

"Not enough people in the Obama administration care about this topic."

Thanks, I should do a reality show about this topic!