This book deals with the main differences between British and American English in vocabulary and spelling, as well as important differences in grammar, pronunciation and punctuation. It is designed to help learners of English throughout the world understand the differences so that whichever variety they choose to speak and write, they can be confident that they are doing so correctly. 'What You Need to Know about' is and open-ended series of ELT reference books on various aspects of English specially planned for intermediate learners who want to get to grips with English. Covering the most important topics of English, the series aims at helping foreign learners build a solid foundation for the learning of the language.