Increasing the size of one's vocabulary, also called vocabulary building, is generally considered to be an important part of both learning a language and improving one's skills in a language in which one is already proficient.
What Every BODY is Saying: An Ex-FBI Agent's Guide to Speed-Reading PeopleRead this book and send your nonverbal intelligence soaring. Joe Navarro, a former FBI counterintelligence officer and a recognized expert on nonverbal behavior, explains how to "speed-read" people: decode sentiments and behaviors, avoid hidden pitfalls, and look for deceptive behaviors. You'll also learn how your body language can influence what your boss, family, friends, and strangers think of you.
Approaches and Methods in Language Teaching 2nd Edition
This second edition is an extensive revision of the first edition of this successful text. Like the first edition, the second edition surveys the major approaches and methods in language teaching, such as grammar translation, audiolingualism, communicative language teaching, and the natural approach.
From the chat codes "PAW" or "Code 9" that teens use to let their friends know that parents are eavesdropping, to the high-powered, computer-driven encryptions used by governments to prevent foreign powers from stealing classified information, covert language is ubiquitous in our society. Now, in Secret Language, Barry Blake takes the reader on a fascinating excursion down this mysterious trail of words, ranging across time and culture. With revelations on every page, and sample codes and puzzles for the reader to crack, it will entertain everyone with an urge to know more about the most arcane and curious uses of language.
There are not so many books about language learning, but this is the best one I found. Short, witty and precise, it tells you all the basics of language learning on your own.
