[mrangle]

No, it's all a part of learning to read and understand language.

If a child is having that much trouble with it, which would be unusual at grade-level, then the book is above their level. At that point, the child should probably be screened for a delay.

How this generally works is that young people ingest these books, and by doing so their language ability increases to be able to flexibly understand (and use, if stylistically appropriate), non-standard grammatical forms.