HMHC - Houghton Mifflin Harcourt Company 2021 Q3 - Results - Earnings Call Presentation November, 05 2021 03:32 PM Houghton Mifflin Harcourt Company The following slide deck was published by Houghton Mifflin Harcourt Company in conjunction with their 2021 Q3 earnings call. For further details see: Houghton Mifflin Harcourt Company 2021 Q3 - Results - Earnings Call Presentation