"For Whom the Stars Shine" is a historical set mainly in Hawaii from 1888 to 1891. It also has a fairly typical romance and a mystery about Eden's mother's death. However, it's primarily a historical novel, and anyone skilled in solving mystery novels will probably have this mystery figured out before the book is halfway done.
Daily and social historical details were woven into the story which created a vivid picture of what life was like then. There was also a lot of information on the (past) Hawaiian missionary movement and (current) political turmoil in Hawaii due to the plantation owners wanting to have Hawaii made an American territory. If you're not interested in this, then you'll probably find the level of detail a little heavy since more information was given than was strictly needed. However, if you are interested, this story is a very enjoyable way to learn about about this history.
The characters were engaging, though Eden was rather naive and the only other character we really got to know was Rafe. The suspense was created by the mystery surrounding Eden's mother's death and the family discord.
There was a high level of Christian content, from giving the history of the missionaries on Hawaii to a preacher character who liked to quote Scripture. But I didn't feel like any of it was preaching at the reader. There was no bad language or sex. Overall, I'd recommend this novel as an enjoyable way to learn more about this period in Hawaiian history.