This book-by-book vocabulary guide provides an unparalleled resource for anyone interested in more effective reading and study of the Old Testament in Greek, commonly called the Septuagint. Aside from two full-scale specialist lexicons for the Septuagint, no other printed resource exists that provides concise and strategic guidance to the language of this important ancient corpus. With word lists organized by frequency of appearance in a given book or section of the Septuagint, this guide allows users to focus their study efforts and thus more efficiently improve their breadth of knowledge of Koine vocabulary. Furthermore, the vocabulary incorporated into the lists in this guide integrates lower-frequency New Testament vocabulary in a manner that enables the user to easily include or exclude such words from their study. Other key features of this vocabulary guide include carefully crafted lists that allow users to refresh higher-frequency New Testament vocabulary, to strategically study higher-frequency vocabulary that appears across the Septuagint corpus, and to familiarize themselves with the most common proper nouns in the Septuagint. Moreover, each chapter in this guide has been statistically tailored to provide the word lists necessary to familiarize the user with 90 percent of the full range of vocabulary in each book or section of the Septuagint.