Houghton Mifflin Harcourt Publishing House Customer Service & Support Phone Number

We are here detailing for you about the contact information of Houghton Mifflin Harcourt Publishing House; we hope that you would found this contact information as helpful.  In case you notice any errors in this contact information, please let us know it, we will review your suggestion and alter the information, if it found as relevant. Houghton Mifflin Harcourt is a US based publishing house specialized in publishing the books of various categories including Instructional technology materials, assessments, reference works, fiction and non-fiction books.  The company was founded by George Mifflin in association with Henry Oscar Houghton- publishing group and latter on 2007 they sold it to Harcourt Publishing. Find here the contact info of Houghton Mifflin Harcourt Publishing House.

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How to connect to a live technician:
  • Continue speaking the word “agent” until your call gets transferred
Working Hours of Operation:
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Email Information:
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Contact Customer service link:
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Company URL:
  • http://www.hmhco.com

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