I know this book gets rave reviews elsewhere, but I found it very disturbing. Again, it's my mommy instincts that are talking here. The plot is about a young boy and his baby sister who fall through a grate into a dangerous underground world. Besides the fact that this little baby is constantly dodging certain death and must rely on a distracted older brother to watch over her, what a horrible thing to think about the mother who must frantically be wondering where her children are. Again, Mommy talking here.