For MMGM, I am recommending The Graveyard Book by Neil Gaiman.
Here's the publisher's description:
It takes a graveyard to raise a child.
Nobody Owens, known as Bod, is a normal boy. He would be completely normal if he didn’t live in a graveyard, being raised by ghosts, with a guardian who belongs to neither the world of the living nor the dead. There are adventures in the graveyard for a boy—an ancient Indigo Man, a gateway to the abandoned city of ghouls, the strange and terrible Sleer. But if Bod leaves the graveyard, he will be in danger from the man Jack—who has already killed Bod’s family.
The Graveyard Book, a modern classic, is the only work to ever win both the Newbery (US) and Carnegie (UK) medals. A New York Times bestseller.
I love this book! There are so many things I could talk about, but here are the major ones. Firstly, the characters are very well-rounded, with interesting backstories (some of which are initially mysteries to the reader) and personalities. Bod, even though he does make mistakes, is still a likable main character. Also, the writing of The Graveyard Book is great. It has its own personality (just like in another of Gaiman's books that I enjoyed, Coraline), making every part of the book interesting. There is enjoyable description which makes scenes vivid and often adds a sense of creepiness. Finally, the plot of the book is great. There are subplots, twists, and climactic scenes that keep the reader on the edge of their seat. All in all, The Graveyard Book is a fabulous novel that absolutely deserves both the Newbery Medal that it won and the love of readers everywhere!