This is a complete 48-volume set of Speed Learning. I purchased it for English study, but I no longer have a device to play the CDs, so I'm selling it as I haven't used it much. Of the 48 volumes, 3 are completely unopened. More than half of the others still have the text books in their original packaging. I'm primarily looking to sell the complete set, but I'm open to discussing selling half the set if you'd like. (The price per volume will be higher due to shipping costs.)