Of course I haven't read this book;however, one of my professes recommended it because web a child has trouble spelling these are great unlike dictionaries. Most of the time when a kid doesn't spell a word correctly they are going to have a difficult time finding the word in the dictionary because you have to know the spelling to look it up there.
I have had this book for years. It is worn and well used. I have dog-eared pages and highlighter markes that date back to fith grade! This is an excellent book for thoes of us that are challenged when it comes to spelling.