https://www.amazon.co.uk/dp/B003Y3BLL2/ref=dp-kindle-redirect?_encoding=UTF8&btkr=1
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.
https://www.amazon.co.uk/Expecting-Someone-Taller-Tom-Holt-ebook/dp/B002TXZT3O/ref=sr_1_1?s=digital-text&ie=UTF8&qid=1472789198&sr=1-1&keywords=expecting+someone+taller
What might happen if the Ring of Power fell into the hands of a very ordinary young man.