Undercover Girl Series by Christine Harris

In a world of secrets, how can you tell what's real?Jesse Sharpe is no ordinary kid. She's an orphan, a genius, and a secret agent. Jesse has been assigned by C2 - the mysterious organization that raised her and taught her to be a spy - to protect another girl from a kidnap attempt. Jesse will have to trail suspects, plant listening devices, crack codes, and kick occasional bad guy butt... moreIn a world of secrets, how can you tell what's real?Jesse Sharpe is no ordinary kid. She's an orphan, a genius, and a secret agent. Jesse has been assigned by C2 - the mysterious organization that raised her and taught her to be a spy - to protect another girl from a kidnap attempt. Jesse will have to trail suspects, plant listening devices, crack codes, and kick occasional bad guy butt. What Jesse doesn't know is whether she can trust C2 and the information she has been given - or if someone within the organization is trying to blow her cover. less

If you make the wrong choice, you die.Jesse is on assignment again, to track down and bring into C2 headquarters a man called Ari. Why is C2 so desperate to find this man? How will Jesse seize him when he is protected day and night by a clever, ruthless professional killer? What is Ari's connection to the group Peace First, which Jesse has been ordered to infiltrate? There's only one way to find out...

Jesse's next move might be her last.Jesse's latest assignment is to infiltrate a sleepover camp and locate two targets. One is a C2 agent working undercover. The other is a camper with "unusual skills" who has been placed at the camp by a vicious group called Nimbus. Jesse knows that the kid she has to find is some kind of threat, but information is scarce. What she uncovers turns out to be larger and more terrifying than anyone has imagined.

Jesse's new assignment is no game--it's dead serious.Jesse Sharpe, child prodigy and secret agent, must find a bomb in a crowded railway station...before the unthinkable happens. Time is running out. Thousands of people could die, and Jesse is the only one who can save them. But the situation is even more deadly than Jesse realizes...

JESSE SHARPE, child prodigy and orphan, is an agent for C2, a secret organization. It is hard to separate the bad guys from the good in a world of secrets. And this time, Jesse is involved in something particularly twisted. She begins to doubt herself. Has C2 forced her to act against her own good instincts and turned her into a heartless monster? She struggles to discover the truth. But will she recognize it when she sees it? Her life could depend on it.