This is a beautiful story told from the alternating viewpoints of Eagan and Amelia. It explores the theory of cellular memory, which implies that memories are stored not just in the brain, but in every cell in the body. While the subject matter may be frightening to some, the characters and their emotions are very relatable. After the transplant, Amelia begins to experience shifts in her personality, and feelings that she suspects must come from her donor. Eagan reflects on her life as she enters Heaven by re-experiencing her memories, and she is better able to understand her mother's point of view when she sees their difficult relationship from the outside. Eagan has a wonderful connection with her grandfather, who also helps her to understand the good qualities in her mother. The teen relationships are sweet and respectful, and the kids only engage in making out. Readers may have questions about what congestive heart failure is and the subsequent transplant operation.