Yes, they are some quite good CL. Werner books. Palace of the Plague God was quite enjoyable, and so was his other chaos books Wulfrik and Blood for the Blood God. The last one Ive reread multiple times. They really give you a strong feeling for the norse and their culture.
Valkia is a decent read, if fairly short, novella sized. TBH its good, but it doesnt compare with the above books.