"Flyte" by Angie Sage

Now that Septimus and Nicko Heap, Jenna's brothers, have found her, they are trying to get out of the grasp of any darke magyk, which might lead Simon back to Jenna, which they can't have. After all, Midsummer day is just around the corner, and that means that Jenna must go to see the dragon boat out in Marram Marches, just like all of the queens and princesses had done in the past, in order to keep the dragon boat's magyk strong, and to keep the dragon's soul company. But, this can not happen if Simon has Jenna captive, with his evil powers, and the skull of the necromancer, named DomDaniel, who was originally out to kill Jenna in the first place.

Jenna, queenling of the castle, was kidnapped for a short amount of time by her own brother, Simon Heap. Now just imagine not being able to trust your own close family member, and imagine him or her taking you away to a dark and mysterious place, where you feel like everything is watching your every move, waiting for the perfect moment to attack.