Heptalogy
Compound work that is made up of seven distinct works / From Wikipedia, the free encyclopedia
Not to be confused with hepatology.
A heptalogy (/hɛpˈtælədʒi/; from Greek ἑπτα- hepta-, "seven" and -λογία -logia, "discourse"), is a compound literary or narrative work that is made up of seven distinct works.[1] While not in wide usage, it has been used to describe such examples as the Harry Potter series of books,[2] and The Chronicles of Narnia.[3]