I counted the words just to make sure: 471
Then I read the query again, just to make sure. Nope. In all those words not a one tells me what the book is about.
On the other hand I do know this: the title; that you believe it is the cat's pajamas; the size of the market is women everywhere; you're going to write more; you'll go on TV to promote it; and, of course, the number of pages in the manuscript.
This is an easy pass.
If you're having trouble with this part of the query letter, step back a moment. Write this sentence down: My book is about (write down what book is about)
Then write: My main character's name is:
Then write: s/he must: (followed by a verb).
Then write: My antagonist is: name. S/he wants to thwart (main character's name) goal by: verb.
Obviously this is a first draft and you'll need to revise and polish but at the very least you'll give an agent reading your query a sense of what the book is about.
If you're writing non-fiction you still need an overview of what the book is about.
If you don't tell me what your book is about, it's game over.