well, to start off, I reallyl oved the series. It tells the "older than dirt" plot of good versus evil", but not as you might normally think. It doesn't just take place in our world, but of many. It follows a kid named Bobby Pendragon, who with the help of his uncle, try and thrawt an evil being known as Saint Dane. Dane' plan is to turn every world, or "territory" into complete chaos for his own scheme. what makes this series really stand out is the writing. It is presented in the form of both 1st person and 3rd person, through bobby's journals sent back home to Earth while he travels throughout the worlds, and 3rd person through others eyes as the plot unfolds. MacHale does a great job of writing informally, making references to real life people and objects in a comical way without making it seem out of place. though the series is comprised of 10 books, each one is more interesting than the last.
Which comes to my only gripe with the series. the finale, while good, just doesn't feel as epic as it should be. it leaves you feeling like MacHale kind of just scribbled something out at the last second when compared to the rest of the plot. Though it is still enjoyable. I found this series in 7th grade, and now being a sophomore in college, I still found reading the last book very intriguing even if the writing isn't up to the calibur of what I usually read. I give it 5 stars. :)