This book is a high/low book with a lower reading level but a high interest level for kids who might be struggling with reading. The Key is about a girl in 7th grade. The publisher states that the book is for 2nd grade through 8th grade. It might be easy for a second grader to read the words but to understand the story line might take a more advanced reader. This is a great book for the struggling older reader to read. It is OK in the story line but it seems not to have a real ending. Since it is one book in a series I would like to think that they are all linked, but I do not have the series to be sure. It does have cursive on some of the pages so that might hinder or discourage some readers from this book, though not all high/low books have cursive in them. Overall it is an ok book for students to use but is mainly for the struggling older readers.