Simplify the following text for a Grade 6 native English-speaking person.
Original: Austen did not have time to see Northanger Abbey or Persuasion through the press , but her family published them as one volume after her death and her brother Henry included a `` Biographical Notice of the Author '' .
Simplified: Austen did not have time to see Northanger Abbey or Persuasion through the press . However , her family published them as one book after she died .