The First Latin Lessons is our main textbook. Others are supplementary texts.
First Latin Lessons, by Harry F. Scott (pdf)
Latin for Beginners, by Benjamin L. D'Ooge (html)
New Latin Grammar, by Charles E. Bennett (pdf, html)
New Latin Grammar, by Allen and Greenough (pdf)
An updated version by Anne Maloney may be found here, on Amazon. The update focuses mainly on prose; if that is a main concern, use the "Search Inside This Book" tool to find the pertinent pages.
First Latin Lessons, by Harry F. Scott (pdf)
Latin for Beginners, by Benjamin L. D'Ooge (html)
New Latin Grammar, by Charles E. Bennett (pdf, html)
New Latin Grammar, by Allen and Greenough (pdf)
An updated version by Anne Maloney may be found here, on Amazon. The update focuses mainly on prose; if that is a main concern, use the "Search Inside This Book" tool to find the pertinent pages.