Houghton Mifflin Harcourt Journeys: Big Bk Unit 6 Bk 27 Grade K A series of candid reflections by the youngest of three sisters on her daily relationships with her older sisters and family.Houghton Mifflin Harcourt Journeys: Big Bk Unit 6 Bk 27 Grade K A series of candid reflections by the youngest of three sisters on her daily relationships with her older sisters and family.