How Long Can You Go? Word Count Limit for First Books

First-time authors who love epics, such as Tolkien or the Outlander or Game of Thrones series, often ask me about word count for their manuscripts. "I'm at 150,000 words," one writer told me recently, and "I just can't seem to cut anything." Another wrote me this week about her ending--not sure where to stop, she keeps writing. Such dilemmas are common …