Ogres at Alcatraz Isle - Cathy Pembroke Tales, #2

The Fae are at it again! All over the world, deforestation has caused the barriers between world to breakdown. Now monsters are invading the city. Cathy Pembroke, a member of the Bay Area's new Fae Enforcement Division, must deal with everything from trolls to fairies to goblins knocking up the local Circle K. Only this time, it's much worse. Ogres have taken over the popular tourist attraction at Alcatraz Isle, and worse, they've taken hostages.
Cathy and her team must find a way to rescue the humans and the landmark. It's their greatest challenge yet. Suitable for ages twelve and up.