What a cute short story. 
 The story has two distinct parts. The first one deals with the goblin King trying to trap and kidnap a beautiful, but very pigheaded and a bit close minded, young girl to marry and live with him in a cave under a lake for the rest of their lives. The young girl is named Kate and together with her sister, Emily, goes to live with some distant relatives that are leasing her land after her father dies. She starts feeling like she is being watched and starts having nightmares at night, and her relatives believe she is a bit insane. Nobody believes her or her sister when they tell how after being lost in the woods, a deformed man guided them home. Marek, the goblin king, is determined to take Kate as his wife, and Kate is determined to fight it. 
 The second part of the book (view spoiler)[ deals with the two of them living together and Kate adapting to her new life. She starts to care about Marek, but when everything seems to go well, a terrible sorcerer puts in danger the entire goblin race, and it's up to Kate to rescue them. (hide spoiler)] 
 I like Marek's and Kate's cute relationship. They grow into each other, and Marek cares deeply for her. Emily seems to be a great character, very different to her close minded sister, but we don't get to know her much. The next book has her as a main character, so I hope I'm right about her. 
 The problem I had with this book was its length. As it is short, the relationship between Marek and Kate is summarized too much in the second part of the book. In just a few chapters, a year and a half goes by and you miss when was it exactly that Kate started to be fond of Marek. It would have been so much better if some time had been spent exploring their feelings and relationship. I wanted to see Kate come to terms with her new life and court, but that happened too quickly. 
 On to book 2.