Amazing. Absolutely amazing. I've already read this book from cover to cover literally half-a-dozen times, yet it draws me in no matter what. I read almost all day today.
I love the struggle with light and dark in this book. Because of this, Grip of the Shadow Plague touches on many philosophical questions that are great starts for discussions. I think this book is also where everything really sinks in. Fablehaven isn't just a magical place with amazing creatures; it - and the world beyond - can be perilous and life-threatening. Not everyone is good. There's evil, death, darkness, and cruelty out there.
There's a lot of great tension, twists, and turns. A lot of times, I wanted to actually scream at the characters or cheer for them. I was laughing aloud many times because of Mull's witty dialogue. Mull keeps you very involved. Whenever I was doing something else, I was constantly thinking, "Why am I doing this? I could be reading now!"
Wow. In short, this series just blows me away. Brandon Mull remains and will remain one of my literary heroes.