8. They are:
1: Anne of Green Gables
2: Anne of Avonlea
3: Anne of the Island
7: Anne of Windy Poplars
4: Anne's House of Dreams
5: Rainbow Valley
8: Anne of Ingleside
6: Rilla of Ingleside
The odd numbering reflects the fact that the last two books were
written out of chronological order. Furthermore, books 5 and 6 are
mostly about the children.
Two books I didn't include in the list, because Anne is only in
one chapter are The Chronicles of Avonlea and the Further
Chronicles of Avonlea.