Katherine is a historical novel based on the life of Katherine Swynford and John of Gaunt. I don't do historical novels as a rule. I find that they are usually too full of references to the past that it some how detracts from the story in hand. I did find elements of this novel interesting and it did compel me to continue reading it, but half way through I became too over loaded with the historical references and notes to the past, that it made the text harder to digest. It is a stereotypical story in the sense that woman is betrothed to someone she doesn't love but falls for someone who is unobtainable. They eventually get the chance to ignite their love when circumstances allow them to be together and the rest of the story is their struggle to remain lovers whilst remaining within the boundaries set by their society.
I don't feel that this has changed my opinion of historical novels at all and unless you enjoy historical novels, then I certainly wouldn't recommend it.