Book 1

Inside the Shadow City

by Kirsten Miller

Published 1 June 2006

Life becomes more interesting for Ananka Fishbein when, at the age of twelve, she discovers an underground room in the park across from her New York City apartment and meets a mysterious girl called Kiki Strike who claims that she, too, wants to explore the subterranean world.


Book 2

The Empress's Tomb

by Kirsten Miller

Published 2 October 2007
With Oona taking the lead this time, the latest adventures follow the Irregulars as they protect New York City and its secret underground world, doing battle along the way with Manhattan's gangsters, rodents, diamond merchants, society figures, and assorted forces of evil. Some of the Irregulars will have to come to terms with deadly secrets from their own pasts, and each of the girls will find her unusual skills and her friendships put to the ultimate test.

Book 3

Kiki Strike

by Kirsten Miller

Published 1 January 2013

Life will never be the same for twelve-year-old Ananka Fishbein after she ventures into a sinkhole near her New York City apartment. Not only does she discover the mysterious Second City beneath Manhattan's bustling streets, she meets the mysterious Kiki Strike, a black-clad, Vespa-riding, cafe-au-lait-drinking girl superspy. Ananka joins Kiki as she recruits four delinquent Girl Scouts into an elite squad - the Irregulars - to explore and map the Second City. But someone else is after the secrets of the underground labyrinth and when Kiki's loyalty is questioned, Ananka will have to take matters into her own hands.