8.Heist Society by Ally Carter

When Katarina Bishop was three, her parents took her to the Louvre...to case it. For her seventh birthday, Katarina and her Uncle Eddie traveled to Austria..... to steal the crown jewels. When Kat turned fifteen, she planned a con of her own-scamming her way into the best boarding school in the country, determined to leave the family business behind. Unfortunatley, leaving "the life" for a normal life is harder than expected.

Soon, Kat's friend and former co-conspirator, Hale, appeats out of nowhere to bring her back into the world she tried so hard to escape. But he has a good reason. A powerful mobster's priceless art collection has been stolen and he wants it back. Only a master thief could have pulled off this job, and Kat's father isn't only at the top of the list, he is the list.
For Kat, there is only one solution: find the paintings and steal them back. So what if it's a spectacularly impossible job? She's got two weeks, a teenage crew,and, hopefully, just enough talent to pull off the biggest heist in her family's history-and, with any luck, steal her life back along the way.
It was such a good book. I read it in two days. There's lots of danger, excitment, and surprises. It was one of the best books that I have read in a long time.