He has been nominated for the Ignatz Award twice (2000: Outstanding Story and Outstanding Series, 2001: Outstanding Story and Outstanding Series), has received praise in Time, and has won the Harvey Award for best new talent in 2002.
In 1995, Jason published his first graphic novel, Lomma full av regn (Pocket Full of Rain). He was given the Sproing Award (the most prestigious comic book award in Norway) that year. In 1997, he started making Mjau Mjau, a semi-regular comic book featuring nothing but his own works. In 2001, he was once again awarded a Sproing, this time for Mjau Mjau 10. Since 2002, Jason has concentrated on making graphic novels.
Jason's work is usually drawn in a minimalist, clean style, inspired by Hergé. His protagonists are usually anthropomorphic animals and/or B-movie monsters. There is little or no talking, and very rarely any captions; unlike most comic books, the reader is forced to rely on the pictures to understand the comics. The net effect is that the comics become reminiscent of silent films and Ernest Hemingway's short stories, where an important part is what is left out.
As Jason's exposure has increased, his comics have been published outside Norway, in Sweden, Denmark, Finland, France, Germany, the Netherlands, Slovakia, Spain, Switzerland, Poland and U.S.. Despite international acclaim, Jason has received limited recognition outside of academic circles in his home country, and is currently most popular in France. His American publisher is Fantagraphics.
|Hey, Wait...||2001||ISBN 1-56097-463-X|
|The Iron Wagon||2003||ISBN 1-56097-541-5|
|Tell Me Something||2004||ISBN 1-56097-566-0|
|You Can't Get There From Here||2004||ISBN 1-56097-598-9|
|Why Are You Doing This?||2005||ISBN 1-56097-655-1|
|Meow, Baby!||2006||ISBN 1-56097-695-0|
|The Left Bank Gang||2006||ISBN 1-56097-742-6|
|The Living and the Dead||2007||ISBN 1-56097-794-9|
|I Killed Adolf Hitler||2007||ISBN 1-56097-828-7|
|The Last Musketeer||2008||ISBN 978-1-56097-889-3|
|Pocket Full of Rain||2008||ISBN 978-1-56097-934-0|