Good for learning new words. Includes different categories of words, including words that came from foreign languages, and games to use to learn new words.

A good reference for especially for writing, but also for reading and speaking. Includes all parts of speech and how to use them.

Good for learning those sayings that are sometimes hard to understand. Includes funny illustrations. Good reference.

Good for learning those sayings, phrases, and expressions that are sometimes hard to understand. Includes more than 600 with where they came from, which helps some in understanding. Good reference.

Tells all about American customs including holiday traditions and other celebrations.

Good for helping Korean students learn English terms. Has each word in both English and Korean. Has an both English and Korean indexes in the back. Good reference.

Explains how to use collective nouns (like cache) in easy to understand English. Good for learning grammar.

Explains how to use nouns in easy to understand English. Good for learning grammar.