Houghton Mifflin Trade and Reference Division is a leading publisher of definitive reference works.

American Heritage® Dictionaries are acclaimed for their elegant, richly illustrated design, their clear and precise definitions, their authoritative usage guidance, and for their breadth of information on the history of the English language.

The American Heritage line features dictionaries and thesauruses for adults and children of all ages, including a brand-new edition of American Heritage First Dictionary.

The popular American Heritage College Dictionary is now updated and includes an electronic passkey for a free downloadable edition.

The American Heritage Dictionary is the basis of the newest word-game sensation sweeping the country: The American Heritage Dictionary Define-a-Thon™. Available now are The American Heritage Dictionary Define-a-Thon for the High School Freshman and The American Heritage Dictionary Define-a-Thon for the High School Graduate.

The popular 100 Words^® series, including the new 100 Words to Make You Sound Smart and the upcoming 100 Words to Make You Sound Great, gives readers a chance to test their vocabulary prowess and provide a fun and accessible way to improve their knowledge of English.

Houghton Mifflin also publishes a variety of books about writing, language, and culture that provide invaluable resources on these topics. Among them are The American Heritage Guide to Contemporary Usage and Style, 135 Tips for Writing Successful Business Documents, and Word Histories and Mysteries: From Abracadabra to Zeus.

Additional reference products include Chambers dictionaries and the Larousse foreign language reference line, available through the Houghton Mifflin Trade and Reference division.

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