It's not the book, it's me. I have twins, so reading about diapers and ear infections and naps does nothing for me but remind of all the stress. I have no idea how to rate this book :(
That said, Gage, being too young at 18 and too mature at the same time, didn't bother me. I used to know a couple of kids who had to grow up fast, and to me it was very believable.