From Viz Media via Simon & Schuster Canada:
Umi and Sora are not alone in their strange connection to the sea. Forty years ago, Jim met another young boy with the same powers. As penance for letting the boy die, Jim has been searching the world for other children with those same ties to the ocean.
(US) - (Canada)
Anglade, a wunderkind who was once Jim's research partner, lures Sora away with the promise of answers. This leaves Umi severely depressed, and it is up to Ruka to help her new friend find his brother. But time is quickly running out..
From Random House Canada
Ruth Galloway is called in to investigate when builders, demolishing a large old house in Norwich to make way for a housing development, uncover the bones of a child beneath a doorway - minus the skull. Is it some ritual sacrifice or just plain straightforward murder? DCI Harry Nelson would like to find out - and fast. It turns out the house was once a children's home. Nelson traces the Catholic priest who used to run the home. Father Hennessey tells him that two children did go missing from the home forty years before - a boy and a girl. They were never found. When carbon dating proves that the child's bones predate the home and relate to a time when the house was privately owned, Ruth is drawn ever more deeply into the case. But as spring turns into summer it becomes clear that someone is trying very hard to put her off the scent by frightening her half to death... (Canada) - available US late summer