The textbooks were compiled by teachers in Harvard's Chinese Language Program. There are altogether ten books (two books each year), fit for first-through-five-year courses. The two books are transition pieces. They contain both original works from well known authors as well as essays adapted by our teachers. The objective is gear towards consolidating basic spoken language and training in the gradual transition to "formal written language" (including formal speech). This series is fit for students of Grade Three in college.