As you are probably aware, there are a large number of literary agents, depending on where you live or what market you are approaching.
I do not know where you live, so it's difficult to advise you.
I would suggest that you do a search on the Net regarding "literary+agents+yourcountry" and see what comes up. Alternatively, you may like to purchase one of the literary agent guides available at http://www.Amazon.com and other outlets.
The two I am aware of are:
* "Literary Agents: What They Do, How They Do It, and How to Find and Work with the Right" by Michael Larsen (US$12.36)
* "Guide to Literary Agents 2001 : 570 Agents Who Sell What You Write" by Donya Dickerson (US$17.59)
Apart from giving you contact information, both guides would also include detailed information on how to deal with agents which would be a must before you sign up with one.