Hans-on Communication ✳︎Level5α Main Book & Supplement, Volumes 2-4 each ✳︎Level5β Main Book & Supplement, Volumes 1-4 each Each comes with a CD. A total of 14 books. These are textbooks purchased from ECC for working adults at 6,000 yen per book. There is a lot of writing in them, but they should be usable for studying by listening to the CDs.