Which ones?
There is the Last Apprentice (only had a chance to read the first one)
And then there is several series/quartets by Tamora Pierce
Heres some series/quartets
Alanna Quartet (First Test, In the Hand of the Goddess, The Woman Who Rides Like A Man and Lioness Rampant)
Immortal Quartet (Wild Magic, Wolf Speaker, Emperor Mage and The Realms of the Gods)

I just listed two out of the many,
Let me know which one you want to know about...

__________________
If you and I were squirrels, could I bust a nut in your hole?
Love is a sensation, caused by a temptation, to feel penetration. a guy sticks his location in a girl's destination, to increase the population for the next generation, did you get my explanation, or do you need a demonstration?
You're good at math right? Is 69 a perfect square?