We're not going to beat around the bush: This book is long and it isn't the sort of read you can power through in one sitting (well, unless you have a lot of coffee and can function on no sleep). The writing allows for quick reading though (translation: not a lot of SAT words), and the plot is fast-paced enough to keep you engaged. In other words, it's a bit of a trek, but you'll be making good time.
The fact that it's a relatively easy read does not, however, mean that it's a simple, frivolous read. Mixed in with the love triangles and teen angst are a lot of metaphors about government control and freedom and statements about impossible choices—so there's some serious food for thought to sustain you along the way.