Here’s the deal: Today’s chapter book market is dominated by series, and publishers are more likely to commit to multiple books by an author who is already established and thus probably already repped by an agent. This is why agents aren’t actively prowling for new chapter book writers. So it’s on you to hunt them down. Study the websites and acknowledgement pages of established chapter book authors to identify their agents. Then study those agents’ websites, blogs, and online interviews to see if their literary sensibilities match your own. Build your submission list this way, expanding the list to children’s book agents with your literary sensibilities even if they don’t already rep an established chapter book author. If your project is well-conceived and well-written, it doesn’t matter if “chapter books” are on the agent’s declared wish list or not—they’ll want it. I’m watching a likely chapter book sign-up unfold for a debut author even as I type this.