The God Jar by Phill Featherstone is a hard book to characterize. There are elements of mystery, science fiction, sorcery, magic, and historical fiction. The author does a nice job of blending them. It makes for an interesting story. Some parts being more interesting than others.
Very briefly, the story opens in Corwall last year. Amy and Jack are enjoying a final scuba dive on the last day of their honeymoon and when Amy spots an object on the sea bed. She dives for it, gets in trouble, and she believes the object saves her life. She is determined to hole onto to the object but many other want it because it is believed to have many powers, hence the God Jar of the title. The story in the present (or last year) is a bit of a thriller and mystery with several well-done action scenes. Periodically the story alternates with the story of the God Jar in the 1500s where its powers are considered almost magical.
It is an interesting book. I did enjoy it but did get a bit bored in the 1500s. I enjoyed the present day part of the book much more.
As usual, my thanks to NetGalley for letting me read this before publication.