HMHC - Houghton Mifflin Harcourt Company 2021 Q1 - Results - Earnings Call Presentation May, 12 2021 04:30 PM Houghton Mifflin Harcourt Company The following slide deck was published by Houghton Mifflin Harcourt Company in conjunction with their 2021 Q1 earnings call. For further details see: Houghton Mifflin Harcourt Company 2021 Q1 - Results - Earnings Call Presentation