HMHC - Houghton Mifflin Harcourt Company 2020 Q4 - Results - Earnings Call Presentation February, 26 2021 01:59 PM Houghton Mifflin Harcourt Company The following slide deck was published by Houghton Mifflin Harcourt Company in conjunction with their 2020 Q4 earnings call. For further details see: Houghton Mifflin Harcourt Company 2020 Q4 - Results - Earnings Call Presentation