In this issue of HARLEY’S LITTLE BLACK BOOK, Harley goes on her strangest adventure yet—back in time to World War II in the alternate universe of the DC Bombshells! When she arrives, these heroes mistake her for this reality’s Harley Quinn and recruit her along on their latest mission: to take out the Nazi party!

So when the other Harley shows up, only the Harley from the future is excited to see her…self? How did Harley end up back in time, and what interesting history will she influence? Find out more by reading HARLEY’S LITTLE BLACK BOOK #4 from writers Amanda Conner and Jimmy Palmiotti with art by Billy Tucci, Joseph Michael Linsner, Flaviano, and Paul Mounts (colors)!