Roget's international thesaurus (Harper colophon books)

A classic reference book that has been used by millions all over the world, Roget's International Thesaurus is the product of more than a century and a half of continual expansion, reorganization, and improvement. Today this book is not only the most time-tested and bestselling thesaurus ever, but, newly revised, it is also the most up-to-date and comprehensive reflection of the English language as it is currently used.