It's a competent book. It's not bad, it's not going to lead to the rise of a second Nazi Germany. But it also isn't divine level writing. It isn't any Paradise Regained, it's not going to convert everyone into rabid Avi fan fiction writers.
It's much like "WWII Aces" for the Wii. They both are competent works, give a good bit of enjoyment, and you can tell the creators of both had both passion and genuine interest in creating them. I recommend this book.
However, I will deduct one star as Avi added WAY too much imagery to this book. Seriously, every line it seems he had this game with himself on how many adjectives he could fit into every line. It honestly gets irritating after a while as the writing itself is extremely verbose. Something that would normally take only 25% of a sentence instead takes up the WHOLE sentence.
If this was a compiled binary I'd think the book was compiled with "-O-2" or something lol.