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    Download your digital resources for Cheng & Tsui titles.

    Key Redemption

    Product Registration Help

    Product Registration Help

    To access purchased content or to download files from the Companion Website, you will need to create an account and register your product.
    Sign in to an existing account or register a new Cheng & Tsui account and enter your product key exactly as it appears.

    (Note: Some products will require you to answer a validation question instead of entering a product key.)

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Reseller Return of Defective or Damaged Books

Returns must be made for exchange or account credit only within one month of invoice date and must be clearly marked as defective or damaged. Please contact Customer Service for a return authorization number.  Once authorized, defective or damaged books should be sent to:

Cheng & Tsui Company
25 West Street
Boston, MA  02111-1213