Minerva's Morse Code

The books sent to the orphanage by William Minerva are all very subtle messages for the kids, from what the orphanage wants to do with the kids to how to survive should they manage to escape. Minerva's stamp (ex libris) on the inner front cover of selected books has imperfections on the ring surrounding its owl emblem that, upon closer examination, spell out words in Morse code, for instance, and that is the  least  hidden of his messages.

These ex libris in the books were discovered by Phil and was further exposed by Emma. The following are the terms that can be seen.
 * Run
 * They plan to escape from the Demon Farm undefined.
 * Norman said to escape during the day but he did not make it undefined.
 * Doubt
 * There are no adults they can trust. They doubt the things they know. Norman said that in reality they know nothing undefinedundefined.
 * Danger
 * Truth
 * They realize the truth that they are food for the Plantation Demons undefined.
 * Harvest
 * This is about Demons farming Humans in the Plantations undefinedundefined.
 * Monster
 * Plantation Demons and Wild Demons undefined.
 * Farm
 * The Gracefield House and the Plantation undefinedundefined.

It is later revealed that Minerva also wrote a letter to the escaped children once they reached the shelter.undefined In the first letter found by John and later by Ray, Minerva congratulated the children on their successful escape from their plantations and that he is waiting for them at a similar shelter located at A08-63.undefined

Promise
This is the Promised Contract that the world was split. One for the Human world and the other for the Demon world undefinedundefined. We shall make a treaty as follows:
 * 1) Humans won't hunt Demons anymore.
 * 2) Demons won't hunt Humans either.
 * 3) The world they live (Earth) in is divided in two.
 * 4) Crossing the border between the two worlds is forbidden.