This is just wonderful.
I certainly do not want to take away from any thunder L'il G-Girl has earned for her very excellent review, but I did want to second, third and fourth the recommendation for this book!
It doesn't matter how old you are, there is so much to this book, everyone can enjoy it! The story is filled with wit, humor and a lot of class. The art, as expected, exceeds expectations - the creative team really knocked this out of the park. It is just like watching the animated series. Which if you haven't started - Do. So. Now.
The subtlety and attention to detail baked in to this book is fantastic. Many of the pages have sub-text and though very faint text, it helps add to the fun of the issue. The best part is, if you try real hard, you can hear the voices from the show shine through - especially the voice of John Di Maggio. :)
There are two stories in this one book. The first, and main story plays, out just like one of the animated series episodes - Intro and everything. I don't know how they did it, but they were able to capture everything I love about the show, in print. The second story, "My Cider the Mountain" is a wonderfully told story dedicated to some of the "B actors" in the series. We get much greater insight into Tree Trunks, Princess Bubblegum and Cinnamon Bun, with great cameos from Jake and Finn! "Fun & Juvenile" would be how I described the feel of this second story... then again, how else would it be described. :) Either way, it fits the theme and mood of the Adventure Time Universe!