It depends on whether you are asking is it worth reading or not worth reading in general or for you personally?
If you mean in general, then the answer is no, there are not any books that are not worth reading by at least somebody.
But if you mean for you personally, then yes. I remember an instructor telling me that while you have to read books assigned to you for classes or work, etc. when it comes to you reading on your own time for the love of reading-for fun-then there are certainly books not worth reading. If by the time you reach 50 pages, you just aren't into it-stop reading the book, he says. when you read for fun, you should enjoy it.
Since then, I've always used that philosophy when reading simply for the enjoyment of reading, rather than for research etc.