This is a wonderful story, told in a much different way than The Hunger Games trilogy but with many of the same themes. It is written in past tense (easier to read than the present tense of THG, imo.) You should definitely read these before you give them to a child and be prepared to talk about it because there's a lot of heavy stuff in there. The later stories reminded me of the graphic novel Maus. No cursing or sexy stuff, but graphic violence. Death. It is also educational, introducing new words and using the storyline to define them ... and the Code of the Claw, in which you have to decode a few messages yourself if you want to know exactly what it says. Pretty cool brain stuff, plus a secret code for notes ;) I know a lot of people complain about the end, but I thought it was just fine. Nothing ever completely wraps up ... life has to go on, even after the adventure ends. but the adventure was the story. Although I wouldn't mind more books, if Collins wants to write 'em! Maybe about Boots when she is Gregor's age...? Just a thought.
So here is how I described it to my friend (who has an 11 year old daughter, which is probably the target audience):
This is the story of Gregory the Overlander (a five-book series), an eleven year old "overlander" who chases his toddler sister, "Boots," (a nickname) down a loose grate in their NYC apartment building. They end up in Underland, where a complicated society of various creatures (with several unlikely heroes) and humans are constantly on the brink of war...
This story is about prophecy, about conquest, genocide... War, above all. Harsh realities forced on a boy by sheer circumstance... or is it?
This story is about Gregor, Boots, his other sister, Lizzie, and between stages of adventure it focuses on Gregor's family situation, both while at home and while being stranded in a land far underground where there is no sun or sky. His mother keeps them supported after his father disappears. They have a mysterious, yet boisterous neighbor, an ostensibly well-off lady who reads tarot cards. She offers repeatedly to read Gregor's cards but he never takes her up on it.
This story is about Underland, where long ago a man descended and built a city for his people to inhabit. The first creatures Gregor and Boots run into are giant cockroaches, or "Crawlers." There are huge, vicious rats (Gnawers); bats that carry and bond to humans (Fliers); spiders large and small, called "Spinners" ... to name a few.
An epic tale of adventure, of loss and heartbreak, of bravery and philosophy. I would have loved these books when I was younger, and I love them now. Highly recommended!