My original Latin book, designed for beginniers, homeschoolers, and self-taught students (paid link).
Keep Going with Latin The sequel to Getting Started with Latin This book teaches you more Latin grammar while encouraging you to begin speaking Latin with friends and family (paid link).
Getting Started with Spanish My beginning Spanish book. This book was selected by The Well-Trained Mind as a top recommendation (paid link).
Getting Started with French My beginning French book (paid link).
The Well-Trained Mind: A Guide to Classical Education at Home This is perhaps the most popular homeschool curriculum guide available (paid link).