For your basic Latin vocabulary needs, there is nothing better.
Knowing just half of the contents of this work will take you far beyond the limits of most Latin textbooks.
Though phrase-learning is quite important, the establishment of a foundational vocabulary (focused on key-words) is also absolutely necessary in language acquisition. This all-purpose, wide-ranging collection provides a handy way for students to attain a very extensive base-vocabulary, including all important roots. Even without mastering all 6000-plus head-words, learners will be able to get valuable insights into how Latin generates vocabularies.
This universal study-resource and diagnostic tool could set an excellent standard for Latin programs at all levels. The work of J. F. Ahn (edited by Peter Henn) has been revised, expanded, and refined into a searchable etext format (not a photographic reproduction of yellowed pages or an error-filled scan). In the listings, long vowels are marked, for the first time here with the addition of many of the "hidden quantities." The full genitive forms of nouns are also now written out in Part I, and there are new, very ample lists of place and time expressions (the latter approaching 500 items).
Part I provides many concrete, sense-based items grouped by theme. Part II gathers words "etymologically," through their relationship to essential verbs, which are put into helpful categories that make recalling those verbs and their principal parts all the easier. There is also a helpful list of synonymous deponent and regular verbs. Part III gathers over 600 short proverbs to make some substantial material available to students in an easily manageable way. An appendix lists all the Latin headwords for convenient review.
If you buy one vocabulary-book, this should be the one. In this day of wildly overpriced texts, it offers an high value at a very low cost.