Hi everyone!
Since I started learning English I did it by focusing on British English, so I've been studying with the Cambridge textbooks (which I highly recommend, by the way). Now, I'd like to start focusing more on American English. Do you know a good textbook I can study for this purpose? It would be fantastic if someone knew about a good textbook which contains all differences between American and British English, as well as the most common slang/expressions used by Americans :)
Thank you!