David Huang

The stakes have never been higher. If Percy Jackson and Annabeth fail in their quest, there'll be hell on Earth. Literally. Wandering the deadly realm of Tartarus, every step leads them further into danger. And, if by some miracle they do make it to the Doors of Death, there's a legion of bloodthirsty monsters waiting for them. Meanwhile, Hazel and the crew of the Argo II have a choice: to stop a war or save their friends. Whichever road they take one thing is certain - in the Underworld, evil is inescapable.

There is something weird happening in Fever Swamp. Something really horrible. It started with the strange howling at night. Then there was the rabbit torn to shreds. Everyone thinks Grady's new dog is responsible. After all, he looks just like a wolf. And he seems a little on the wild side. But Grady knows his dog is just a regular old dog. And most dogs don't howl at the moon. Or disappear at midnight. Or change into terrifying creatures when the moon is full. Or do they?

Beak-a-boo, it sees you! Cooper Klavan and his sister Anna are fishing with their parents at a woodland pond when they come across an injured bird. Anna, a huge animal lover, insists on taking it home to rehabilitate. But the bird really does not want to be rescued. It bites Anna, and scares Cooper. Soon, Anna is behaving very strangely. She's perching high up in trees, gathering sticks to hide in her room, and refusing to eat eggs-- once one of her favorite foods. Cooper doesn't want to jump to any conclusions, but his sister seems to be going to the birds.