Big data -- Social aspects. Data mining -- Social aspects. Internet -- Social aspects.

Solitude -- Fiction. Murder -- Investigation -- Fiction. Man-woman relationships -- Fiction. Orphans -- Fiction. Marshes -- Fiction.

Valkyries (Norse mythology) -- Juvenile fiction. Gods, Norse -- Juvenile fiction. Secrecy -- Juvenile fiction. Triangles (Interpersonal relations) -- Juvenile fiction. Voyages to the otherworld -- Juvenile fiction.

Animals -- Encyclopedias, Juvenile.

Courage -- Juvenile fiction. Friendship -- Juvenile fiction. Yeti -- Juvenile fiction. Film novelizations -- Juvenile fiction. Yeti -- Fiction.

Children -- Conduct of life -- Juvenile fiction. Conduct of life -- Juvenile fiction.