Loss (Psychology) -- Juvenile fiction

Harry has been knocked down by a lorry, and he's dead. Now he's on the Other Side, waiting to move to the Great Blue Yonder. But he doesn't know how to get there - until he meets Arthur, who has been dead for years.

Siobhan missed her mother dearly. Ever since she had gone, she spent her days reminiscing about the time they spent together. She remembered her mother's voice singing and her mother's hands combing her hair, but no matter how hard Siobhan tried she could never see her mother's face.