this is the first book of Harry Potter series.
this is the first book of the Harry Poter series
There are seven books in "Harry Potter" series.
This is the first book of Harry Potter series.
There are seven books in all in Harry Potter series.
1.This is the first one of Harry Potter Series.
补:There are seven books in all in Harry Potter Series.
1.this is a book of HARRY POTTER series
2.there are seven books in theHARRY POTTER serices