I am writing a book that probably falls under the young adult science fiction/fantasy category and have several questions on word count and the appropriate length for books such as mine. I have seen suggestions for 120-180 thousand words, and my book is nearing 113 thousand words and not even at the climax yet. I know a way to end my book early and make the rest of the book a sequel, but I was thinking, why not keep it one book? Fantasy young adult and teen novels are commonly an exception to the 120-180 thousand word rule, such as Twilight, Harry Potter, Eragon, etc. Can my book be an exception also or should I end it early just in case?