Artwork: 4/10
For the technical aspects of the art, it seemed like a rookie's work. Like the first graphic novel done by an artist or publishing house.
The artwork seemed rushed, and outsourced. I looked in to the artist who pencilled this and she's from Indonesia. I'm familiar enough with the comics industry to know that a lot of outsourcing occurs in indie publishing, and Indonesia is a hotbed for getting cheaper work.
Not that it isn't possible to get good work from Indonesia, but when publishing in English this often results in things being lost in translation. I imagine this language barrier contributed to how the speech bubbles often switched from being read left-to-right to right-to-left. Very confusing.
The anatomy was fine enough, I've definitely seen worse in YA graphic novel adaptations (looking at you Vampire Academy), but the backgrounds were pretty bad. Probably the worst aspect of the illustrations.
It looked like things were traced over Google Sketchup by someone who didn't have a firm grasp of perspective, or color.
Apparently the colors were done by 3 people, and maybe that led to inconsistencies, because my God, it looks like it was colored last minute. I was begging for some color overlays to be included because some of the color palettes were just not harmonizing. Light sources were inconsistent, so scenes were a character's face was being lit from the top would switch to being lit from the side.
It would have been better off in black and white with how amateurish the colors were. Maybe that would have saved the Google Sketchup backgrounds.
There were even certain background shots where I could see tilting going on as if a wide angle lens was being used. It was jarring, and sometimes this field of view shift would occur from panel to panel.
As for the feel the artwork gave me, I didn't feel like much love was put in to this. It felt like this project was more of a job for the company that did the artwork.
Story: 3/10
I'm not going to judge the quality of the source material so much as the adaptation job. The original story has its flaws (full of plotholes, cliches, and lack of worldbuilding), but despite that has a tone that is charming. Taking it as a fun kids' book, it's enjoyable. Especially in audiobook format.
However, this adaptation did the story no favors. The speech bubbles were all over the place and I had to double-read many panels to get the flow right. Not to mention the pacing was bad. The setup was decent, but by the time Otis's nature is revealed and the final "battle" occurs, things wrap up and the entire story ends in like 5 pages. It's very underwhelming.
I think graphic novels by their very nature don't work well when adapting novels. There's a reason that the original story worked, and it's because of the dialogue, the main lead's introspection, and the slower build to the climax and ending. This doesn't have that, and I'm not sure if any graphic novel adaptation would have been able to capture that initial appeal.
Part of the failure comes back again to the artwork and how the style didn't really capture the tone of the story. The characters had no real expressions to their faces, and I didn't feel like I was watching a real character feel real fear, for example. But adding poor pacing in addition to those artistic isuses and we have a bad adaptation that could have been better, despite the limitations of the graphic novel format.