I'd heard a lot of good things about these books, and being a fan of post-apocalyptic fiction in general, I decided to give them a go. I don't regret this, exactly, but they weren't exactly what I was expecting.
The first book follows our main character, Katniss, as she participates in The Hunger Games - an annual event in which a group of randomly selected young people have to fight to the death in an arena. The young people are selected from twelve poor Districts (two from each) surrounding a wealthy capital - of course, it's the rich people in the capital who are entertained by the poor kids fighting it out. The whole event is televised for the entire nation to watch. The second two books follow on directly from The Hunger Games, and examine the aftermath of the events portrayed therein, ultimately leading to an attempt at revolution from the Districts.
These books can be read on quite a shallow level as a simple adventure story, but there is a not very subtle attempt at examining what it means to be human and compassionate, how wealth and power can change you, and what sparks a revolution (and what is required to keep it going). The books are well-paced and fraught with tension - I read the lot in about three days flat, and could hardly bear to put them down.
The loss of a star comes from two things: the writing, and the main protagonist. The writing is, for the most part, very straight-forward and not particularly adventurous or descriptive. The reasons for this are clear (the story is told from Katniss' perspective, and for much of her life she has been too focussed on survival to be able to be highly imaginative), but at times it does feel stilted and overly simple. The main protagonist, Katniss, is not always likeable - but the problem is more that she is billed as a fairly intelligent young person, but seems completely oblivious, even stupid, when it comes to certain areas.
All in all, though, the books are an excellent read and well worth checking out, whether you are a member of the intended teenage audience or not.