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I have this set, which includes six items: textbook, workbook, teacher's manual, answer key, presentation books 1&2. Here is a link to the textbook for more info. http://www.paperbackswap.com/book/details/9780574156549-Connecting+Math+Concepts+Level+C+Textbook
PM me for details if you are interested in these, I would love for someone to have this as a complete set.