CREATE TABLE table_20193855_2 (author_s__or_editor_s_ VARCHAR2, book_title VARCHAR2)

How many authors or editors are there for the book title elf child?
SELECT COUNT(author_s__or_editor_s_) FROM table_20193855_2 WHERE book_title = "Elf Child"
SELECT COUNT("author_s__or_editor_s_") FROM "table_20193855_2" WHERE "Elf Child" = "book_title"