I don't remember most of it but I know this,
At the beginning there were live photos of a man finding the "book" and a note stating he found it somewhere.
All of the speech in the graphic novel was in an alien language. Absolutely none of it was English.
The aliens were very cute in style and had an "Invader Zim" style to them.
Here is where it gets weird. There were scenes that involved aliens murdering others and there was one scene where a mad scientist type alien took hooks and opened one of the alien's eyelids as a form of torture.
I have not seen or heard of this book since I was in Elementary school, which means it was probably from 2002-2007.
I do remember there was one main alien throughout the book as well and they would meet other aliens that would end up dying or leaving for one reason or another.