"The Song of the Lioness - Tamora Pierce", "Protector of the Small - Tamora Pierce", and "Tricksters - Tamora Pierce" could productively be merged into one category, "Tortall - Tamora Pierce", if no one objects.

Also, "The Immortals - Tamora Pierce", although I don't see a nomination for that as yet. They are all quartets/duologies within one world/continuity, with several characters appearing to various extents in all of them.

If this happens, "Alianne Cooper (Trickster's Choice/Trickster's Queen)/Keladry of Mindelan (Protector of the Small)", currently in "Crossover Fandom", should be moved to "The Immortals - Tamora Pierce".