Befitting my dotage and escape into a 2nd childhood I've just finished volume 6 of Brian Wood's Northlanders series - Thor's Daughter. It's a graphic novel - comic book to those who disapprove.
I don't read a lot of these, but I'm interested in the Viking Era. There's not a lot of affordable non-fiction works out there (I've read the main ones), not much fiction beyond Frans Bengtsson's The Long Ships. What I most like about the series is the fiction is placed in the 'real world'. The big story in Thor's Daughter is 'The Siege of Paris,' which took place in 885.