Some have said this book is fine until the character of the mother, in the grasp of her love for her son, starts impinging on his privacy by sneaking into his teenage and adult bedrooms at night to rock him and sing her touching ditty. Come ON, folks, it's FICTION! Adults reading it to their kids are not going to use these scenes as suggested courses of action when their kids grow up, and, when the kids themselves are older, they certainly won't be expecting Mom at the upstairs window odd nights. The point being creatively made is the ongoing strength of the mother's love and how it is reciprocated by, and transfers to, her beloved child. Don't "read in" inappropriateness or overlay adult ideas of unhealthy codependency on this unusual but imaginative story -- you may simply confirm the veracity of its central message by asking randomly selected mothers to read the book aloud; nearly all will be choked up with emotion by the last page. And what do the kids think? Well, we have 300+ children's books in our house, and my 2-year-old and 7-year-old still bring our 4-year-old copy over to the couch for reading time several times a month. Final note: One day, several of us moms, agreeing that we all loved this book, sang our versions of the song for each other. Each had come up with a different, lovely tune for the lyrics, and each occasionally sings it for her children even when the book is resting on the shelf.