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    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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In order to make sure that your inquiry goes to the best team to answer your questions, please review the following options and choose the best email:

For general product information, pricing, ordering questions or problems, and returns, please email

For technical support, please fill out a support ticket

If you are a teacher, or school or district administrator and have questions about using one of our textbooks in your courses, please email

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