Columbia subject headings:
Harvard subject headings:
Best friends--Fiction.
Deception--Fiction
Detective and mystery fiction.
Detective and mystery stories
Friendship--Fiction.
Impersonation--Fiction.
Orphans--Fiction
Princeton subject headings:
Best friends--Juvenile fiction.
Deception--Juvenile fiction.
Female friendship--Juvenile fiction.
Fiction.
Impersonation--Juvenile fiction.
Orphans--Juvenile fiction.
Runaway teenagers--Juvenile fiction.