Earth at the Crossroads : Understanding the Ecology of a Changing Planet ( course # 1720 ) The complete set of 3 transcript books, covering all 36 lectures. Transcript books only — no DVDs or CDs are included ! Condition : BRAND NEW, SEALED When you buy Brand New you know what you’re getting ! Shipping 6 days a week I offer combined shipping : $2 off the shipping on each additional item