This was a project for me that was a long time in the making.  I love these types of stories, where it's more than what it is.  Transcending the actual meat of the plot, they become more about the characters--in this case: the family.  Think of 'Walking Dead'.  It's about zombies, but is it really?  It's more about the people--the survivors, and how society may function.  The zombies take second chair to their interactions.  Or in the case of the 'Lost in Space' remake on Netflix; the main plot is about their survival in space and trying to get home, but the sub context is all about the Robinson family, and how they relate.  It's about what this family goes through together and, even though the story takes place in an impossible setting, that most of us would never be in, the subtleties remind us of what we go through with our own families.  They at least help us imagine ourselves in those settings; what we would do, how we would act.  That's the beauty and wonder of story, and why I love it so much!  'Avatar' is another example.  As much as I loved the first film, I must admit, I was skeptical about the sequel.  It had a good ending and I thought it was going to be a stretch to make a new plot but, boy, was I wrong?  The sequel was almost even better than the first, and they made it all about Jake's family and kids, and his self-discovery as a father.  I loved that!  The upcoming three-quel looks as though it promises to continue in the same fashion.
All that to say, I highly enjoy the 'Family epic' story, and I always wanted to write one of my own.  I started writing this series before 'Avatar: the way of water' ever came out, but I developed these books around the same vein of delivering emotional, character-driven, powerful scenes that audiences love.  
I know you will enjoy this series!