Monster Madness (Nightmare Academy, No. 2)

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.

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.