Anna Olswanger has been a literary agent since 2005 when she joined Liza Dawson Associates in New York. This year she founded Olswanger Literary LLC, where she represents picture books (author-illustrators only), middle grade fiction, and nonfiction for adults. Anna enjoys discovering new authors and illustrators. She is looking for "voice," the sound and rhythm of an author that could be no one else's, and has a special interest in children's picture books (author-illustrators only), adult nonfiction, Judaica, Israel, and animal stories.
Anna has sold to Bloomsbury, Boyds Mills Press, Delacorte, F+W Media, Chronicle, Cinco Puntos, Eerdmans, Greenwillow, HarperCollins, Houghton Mifflin, Palgrave Macmillan, Pelican, Penguin, Peter Pauper Press, Pomegranate, Random House, Simon & Schuster, Skyhorse, Sleeping Bear Press, and Wiley, among others.
She works hard with authors to get their manuscripts into shape for submission. In that sense, she's also an editor. She finds that most manuscripts need work on the plot, so if you're a potential author or illustrator client, be ready to go through many revisions before Anna agrees to send out your manuscript. Her job is to get the story to the point where an editor will make an offer. (And then be prepared to make more revisions for the editor.)
You can read interviews with Anna online at Cynsations, the blog of Cynthia Leitich Smith, and artistsnetwork.com, the site of Artist's & Graphic Designer's Market. You might find other interviews with Anna on the Web, but most have outdated information. For example, these days she requires email queries, not snail mail.
So, having read the above, if you think Anna would be the right agent for you, start by sending her an email with a few details about your book. She can usually tell from a query if she would be the right agent, and if not, don't take it personally. Just move on to the next agent. This is a subjective business and it's a matter of finding who you click with.
If Anna likes what she reads in your query, she'll ask to see the first five pages of the manuscript in the body of an email. (She doesn't open attachments.) At that point, she'll either ask to see more of the manuscript, or let you know she's not the right agent for you. She's not able to give feedback if the latter is the case, and you'll find that true of most agents (they reserve that time for their clients).
And finally, if you have any questions about the above, send Anna an email and she may address them on this page. That means she'll probably be modifying the page over time. Check back if you're interested.