The best International English course ever made. It has a Student's Book that's 158 pages long, a Workbook, and accompanying 45- or 55-minute cassettes for practice. "International English" is the way to refer to the muxture of American and British English in a book. However, books are only written in one of the two parts of English, being or American or British English. But this is INTERNATIONAL English, that is, the English spoken as in Britain as in the USA.
The book features pronunciation exercices, dialogues, telephone messages, etc., all recorded in 2 45- to 55-minute cassettes.
The workbook has a cassette, too. It's important to read and listen to the course all around once, then do each unit a secibd time. I think I chose the right course.