Literary agents play a pivotal role in an author's journey toward traditional publishing, especially with major New York publishing houses. They act as intermediaries between authors and publishers, leveraging their industry expertise to secure favorable book deals, negotiate fair contracts, protect writers' rights, and ensure accurate compensation. While securing an agent is often essential for mainstream fiction and popular nonfiction targeting large audiences, it may not be necessary for niche markets or academic works. Understanding the commercial viability of one's manuscript is crucial; not all books are suited for major publishers, and many find success with mid-size or independent presses. Aspiring authors should research market trends and maintain realistic expectations about their work's potential reach.