Complex sentence: As of 2012, all Harcourt books that have been re-released are now under the Houghton Mifflin Harcourt name, while the Harcourt Children's Books division left the name intact on all of its books under that name as part of HMH.
Split into simpler sentences: As of 2012, all Harcourt books that have been re-released are under the Houghton Mifflin Harcourt name. The Harcourt Children's Books division left the name intact on all of its books under that name as part of HMH.