Kate Hannigan

Eleven-year-old Nell Warne arrives on her aunt's doorstep lugging a heavy sack of sorrows. If her Aunt Kate rejects her, it's the miserable Home for the Friendless. Luckily, canny Nell makes herself indispensable to Aunt Kate ... and not just by helping out with household chores. For Aunt Kate is the first-ever female detective employed by the legendary Pinkerton Detective Agency. And Nell has a knack for the kind of close listening and bold action...

Akiko, Mae, and Josie, also called the Infinity Trinity, spring into action after learning that a spy is betraying secrets to the Japanese military--and that Akiko's mother may be involved.