Copyright © 2016, Steven E. Houchin. All rights reserved.
The subject of literary agents came up recently with some of my aspiring writer friends. Specifically, "I'm ready to send out a query, but where do I look to find agents?"
The first and standard answer is to buy a copy of one of the Writer's Market series of books by Writer's Digest, such as Guide to Literary Agents 2016: The Most Trusted Guide to Getting Published. In addition to listing tons of agents, it has tips on queries, synopsis writing, and other how-to articles.
Another place to find agents is online information for writers conferences around the country. The organizers often prominently list the agents who are attending and what kind of works they wish to represent, such as non-fiction subjects or certain fiction genres. This will lead you to that agency's website, and once there you may browse its whole stable of agents to find an even better fit.
Another source is published authors themselves. You might attend an event at a local bookstore, where the author's work matches your genre and, if you can get some facetime with her afterward, ask for an agent recommendation. Alternatively, some authors list their agent in the book's acknowledgements up front.
Some online resources specialize in agents and agencies. One I've used is AgentQuery, which bills itself as "The internet's largest free database of literary agents." It has a cool search feature that allows you to specify a genre. It also has query tips and success stories. The site Preditors & Editors is popular and useful for checking out an agency's reputation. Its format is primitive, but it can give some comfort that the agency you're considering seems reputable. The Science Fiction Writers of America maintain a Writer Beware site that not only has great information about bad agent practices, but also has a Resources for Agent Hunting section.
Of course, you can search Google for terms like "literary agent thriller" or whatever and see what you get, then use some of the resources above to narrow down the choices.
However you choose to search, once you start looking, you should find a dozen or more prospects quickly. Then, it's a matter of researching each one to make sure they've had recent book sales, no complaints of scams, they're actually accepting queries, and the genre/subject still seems like a good match. Sometimes, you can find a recent interview with the agent posted online that may give you better insight into their likes and dislikes, their dos and don'ts, and personality.