Los megamonstruos intentan invadir nuestro mundo con todas sus fuerzas, y el unico que puede ayudarnos es un ser misterioso llamado el Guardian. Pero el Guardian esta agonizando. Para salvarlo, Charlie Benjamin y sus compañeros de la Academia de Pesadillas tendran que internarse en lo mas profundo de la cueva de la Hidra, atravesar el inquietante cementerio del Triangulo de las Bermudas, y llegar al zoologico de San Diego, un lugar traicionero ¡y lleno de monstruos! Charlie y sus amigos viviran peligrosisimas aventuras en esta trepidante secuela a Nightmare Academy 1: Charlie y el mundo de los monstruos. / We're under attack! The last of the mega-monsters known as the Named are fighting their way into our world, and only a mysterious being known as the Guardian can helpbut the Guardian is dying. To save him, Charlie Benjamin and his friends from the Nightmare Academy must journey into the heart of a Hydra cave, through the spooky Bermuda Triangle graveyard, and across the treacherous, monster-filled San Diego Zoo....

It's the monster hunters' last chance to stop an all-out monster war!

We're under attack! The last of the mega-monsters known as the Named are fighting their way into our world, and only a mysterious being known as the Guardian can help—but the Guardian is dying. To save him, Charlie Benjamin and his friends from the Nightmare Academy must journey into the heart of a Hydra cave, through the spooky Bermuda Triangle graveyard, and across the treacherous, monster-filled San Diego Zoo.

...

Join Charlie Benjamin on a "fast-paced, action-packed"*adventure. When Charlie's nightmares bring monsters to Earth, Charlie gets a once-in-a-lifetime chance to learn to control his powers at the incredible Nightmare Academy. "Marvelous creatures"** greet Charlie and his new friends as they embark on "a straightforward thrill ride"*** of "rip-roaring monster slayings"*** in a debut novel that's "pure entertainment."**

...

When Charlie Benjamin sleeps, monsters wake up.

It's hard to fit in when your nightmares open portals to the Netherworld, where horrible creatures live—like the class 3 Netherstalker that invaded a sleepover and tried to eat the other children. Luckily there's a place for Charlie—the Nightmare Academy. Built from wrecked ships set in the branches of the world's most incredible tree fort, the Academy trains people to use their unique gifts to fight the monsters that rush in when the lights go out. But Charlie is far more powerful than anyone ever imagined, and his entrance exam opens a portal straight to the heart of the Netherworld, where ultimate evil plots Earth's destruction. He'll need all his cleverness—and the help of his new friends—to save himself and his family and to put these bad boys to bed once and for all. The monsters under your bed are real!

But never fear—the Nightmare Academy will train Nethermancers and Banishers like you to destroy them!

...