Beware The Eye Of Odin by Doug Wagner,

This was just pure fun. Pure Viking fun. A classic saga premise of a grand quest involving a mythical object and a motley cast of characters. Oh, and Trolls. Oodles of them.
Basic plot: a brash prince sets off to return the titular object to its owner or die. The prince is joined by a one-armed great warrior with a fun mace-like weapon and a young woman who thinks she’s a Valkyrie. They go on to have all sorts of adventures and battles most of which involve Trolls.
Energetically told with great technicolor art to boot, this was such an entertaining read. No matter how valiant and heroic the protagonists are, the Trolls totally steal the show.