The Power of Three (Charmed #1) by Eliza Willard

THE POWER OF THREE

In this night and at this hour,
I call upon the Ancient Power.
Bring your powers to we sisters three.
We want the power. Give us the power!

Prue, Piper, and Phoebe Halliwell didn't think reading a magical incantation would really work. But it did. Now Prue can move things with her mind, Piper can freeze time, and Phoebe can see the future. They are the Charmed Ones - the most powerful of witches.
   But being enchanted has a price. There's a warlock who wants to steal their powers. And he'll do it any way he can - even if it means killing them!