It is a fun read for Tolkien fans (and also Wagner fans and lovers of Icelandic sagas). The plot is set in Iceland and concerns a possible lost source that inspired Tolkien.
lots of twists and action and a very Tolkienesque ending.
On the subject of books, this one I read years ago as a fan of the Ring cycle, and it is hilariously funny.
What might happen if the Ring of Power fell into the hands of a very ordinary young man.