My son's a big Geronimo Stilton fan. The books of that series are colourful, fun, and the storylines appeal to kids. Winner all around. I personally am not a fan of the "first-person" descriptive style (like I went there, I did this, such-and-such happened to me) but my son doesn't seem to mind it.
Imagine my surprise when he brought this book home from his school library (being a comics enthusiast, this format appeals to me more than the earlier-mentioned Geronimo Stilton books). And guess what: it's still colourful & fun! I really liked the facts & trivia peppered throughout the book: they're really informative!
I'll be sure to keep an eye out for more of these Geronimo Stilton graphic novels! (Uh... for my son, of course!)