Peter’s career began in the late 1980s, creating artwork for hundreds of roleplaying games and sourcebooks, including titles such as Mutant Chronicles, Dungeons & Dragons, Vampire, and Shadowrun. In 2006, he released his first comic book for Image Comics, followed by a run on Strange Girl with Rick Remender. After producing several graphic novels for IDW with writers including Richard Morgan, Alex Irvine, and Joe R. Lansdale, Peter landed his first project for Dark Horse Comics, providing artwork for the Hellboy Roleplaying Game.

Since 2013, Peter has worked closely with Mike Mignola and Christopher Golden on various titles in the Mignolaverse, including Baltimore, Joe Golem: Occult Detective, and Frankenstein. To date, this collaboration includes more than 50 comic books and nine graphic novels.

Peter has created hundreds of covers and thousands of interior illustrations for comics, children’s books, and fantasy titles, working with authors such as Clive Barker, Philip Pullman, J. R. R. Tolkien, Michelle Paver, and Frank Frazetta. Outside of the Mignolaverse, this body of work also includes more than 20 graphic novels for various publishers, among them Sweden’s most successful graphic novel, Gängkrig 145, created with Jens Lapidus.

Peter has written and illustrated a total of 16 works, including graphic novels, fantasy novels, art books, and non-fiction titles, several of which are available in Swedish, English, Finnish, French, and German.

Peters art is featured in Spectrum: The Best of Contemporary Fantastic Art, The Art of Shadowrun, Mutant: Minnen från den förbjudna zonen, Boken om Drakar och Demoner, and the retrospective book Äventyrsspel.

Peter has been nominated twice for the August Prize, for Kråkorna and Vi kommer snart hem igen.