Kiki Strike: Inside the Shadow City

When I was a kid, I really wanted to be a secret agent, kind of like Alex Rider in the books by Anthony Horowitz. (Stormbreaker?) I loved watching spy shows on TV; still do. That was why I picked this up. You can "see" the action in the pages; in your mind, you can just hear snappy spy music playing while you're reading a scene. And this is really deep of me: I loved the cover.
"After discovering a secret world beneath Manhattan's city streets, Ananka learns about the Shadow City through a meeting with one of its residents, Kiki Strike, yet as Kiki begins to recruit delinquent kids to guard her underground world, Ananka begins to fear her new friend and worries that her connection to both worlds may not be a good thing after all."

P.S. Just visited the website, http://www.kikistrike.com/ (I don't want to go into the whole description thing. Just visit it!).