Genki books form a course in Elementary Japanese. The 2 main textbooks are comprehensive. The 23 chapters in textbooks take you from being an Absolute Beginner, to being able to understand and produce complex expressions and vocabulary. The textbooks are made for classroom study, but many exercises can be done independently at home. The detailed grammar explanations provide a wordy but excellent resource. A separate workbook can also be purchased for home study. Visit jlc.jptamerica.com to know more.