This set includes volumes 25-31 volume 25, 26, 27, 28, 29, 30 and 31. I have three more sets with different volumes. They were too heavy to ship together. These volumes alone weigh 5 pounds. Some of them have been used but most of them have not. They have been stored in the bags that you see in the pictures. All of these were originally $14.95. They are collectors items.