How does Ransom Riggs use imagery in Miss Peregrine's Home for Peculiar Children?

Imagery:

"It was an enchanted place [Grandpa Portman] said, designed to keep kids safe from the monsters, on an island where the sun shined every day and nobody ever got sick or died. Everyone lived together in a big house that was protected by a wise old bird - or so the story went."

"They were orphans of war, washed up on that little island in a tide of blood. What made them amazing wasn't that they had miraculous powers; that they had escaped the ghettos and gas chambers was miracle enough."