The Hacker's Key

Ada Genet spent her childhood helping her father, master thief Remy Genet. But when they were finally caught, Remy ended up in prison and Ada was sent to a military boarding school. When the Hacker's Key, a tool that can shut down every computer, smartphone, and internet-connected device, is stolen from a secret UN installation, a clue left at the scene points to Remy, but he's been in prison the whole time. Remy will only speak to Ada and he sends her off on a global quest to find the Hacker's Key before it can be used.