Question: The whisper people bring the selected boy and girl to safety before the final day of earth. Why do they plant a message to be found and decoded just before the final day? I do not think the whisper people need any help from any humans to save humanity (and organize a whisperers' version of Noah's Ark).
Moalian
3rd Jun 2016
Answer: There is no intention on the part of the whisper people to warn humanity as a whole, merely a select group of children who appear, due to their telepathic powers, to be the next stage in human evolution, and their respective guardians.