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How do I contact your Customer Service Department?

Online:

Send us comments or feedback through our online feedback form:

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Please include as much detail about your problem as possible. Include your address, zip code, and telephone number (if you would like telephone follow up).

Phone:

1-800-423-4595
1-617-547-4170 (International)

8.30am :30 am - 5.00pm Mon - Fri :00 pm Monday-Friday (US Eastern Time)

Fax:

1-617-876-9235 (24 Hours)

Bookstore

We welcome your visit to our walk-in bookstore. Our retail location is
1734 Massachusetts Avenue in Cambridge, MA 02138.

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Our retail hours are 9:00 am - 5:00 pm Monday-Friday (except holidays).

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