The Alchemist's Girl — Christine M. Morgan

Having a special secret is cool. Like the special secret Kevin Broderick shares with his twin sister Katie and their little brother Sam . . . the secret of the magical silver doorway in their aunt's basement, a doorway that leads to another world. Kevin learning to swordfight? Cool. Katie studying magic? Cool. Adventures, elves, dragons, treasure, talking animals? All extremely cool. Dangerous, sometimes . . . but still, very cool. Until something bad happens to Aunt Ellie. That's not cool. She's been poisoned . . . or enspelled . . . or something. No way is that cool. Her cat Chester can't help. Her boyfriend Cal can't help. It's up to Kevin, Katie and Sam. They have to go through the silver doorway and find a counterspell or an antidote before it's too late. They don't have a guide this time. They don't know where they're going. They don't know what they're looking for, or what kind of enemies might be trying to stop them. And they've got Kevin's friend Toby, who just ran away from home, insisting on coming along for the ride.