The Book of Roots Author:Paul O'Brien The Book of Roots offers weekly exercises based on a comprehensive list of English derivatives and Latin root words coordinated with the vocabulary in Latina Christiana. Students will learn the definition and etymology of over 1,500 English derivatives, along with prefixes, suffixes, and supplemental Latin vocabulary lists. The Book of Roots is ... more »a self contained vocabulary course that doesn't require a Latin background, however, it does coordinate with Latina Christiana 1 for students who are studying Latin grammar at the same time. Grade: 3 and up« less