Alright, first I would like to note that while this book does have a Mature Reader's warning, it does not have violence warning for either "Desire of the Gods" or "Scarlet Serenade."
While "Desire of the Gods" does resemble "Prisoner of the Immortal," it makes more sense then its predecessor. There are some confusing parts, which I think would be eleviated if I knew the original norse tale, but most of the story is easily understandable. I really am fond of the plot and, being fond of stories of domination and overpowerment, I enjoyed this story up until the ending. I really didn't like how it ended, and was confused as to WHY this event happened (don't want to give the ending away, sorry. I will not that while I like domination and power trips, I do not like violence, aka pain).
The story "Scarlet Serenade," while having unique art, isn't one of my favorites. The art is just not...concise? I am a fan of japanese anime style art, and so this is probably why. The art is unique, however, which is always good for an interesting read. Personally, I didn't like, but I'm not a fan of murder or death in a yaoi story. Over all the plot was good and the characters were interesting. Again I didn't like the ending, but that depends on the person reading. If you don't mind a little blood, then you'll like this story.
I liked "Modern Vampire" the most, mainly because I devour vampire stories and have been engulfed in Anne Rice (who I only recently discovered, unfortunately, as I had thought her stories to be like Stephen King who I don't read) for the last 2 weeks or more. I was a bit unhappy that "Modern Vampire" was so short, and there was no background to the vampire or to the lover. I would love to see more of those two, personally, but the story was an awesome read!
Overall, this book is a good buy and a very good read. I didn't like some parts of the stories, but I still liked the book overall :) Best book yet, and I can't wait for the next one!
Update: I read on the story of Baldur, and apparently his mother had seen him dying in her dreams, and it was told by a seer of sorts that he would go into Hel at the hands of his brother Hod (warriors go into Valhalla, others go to Hel). To save him, his mother and father ordered all things living and unliving to vow not to harm him. For some reason his mother left out mistletoe and Loki, being the more crafty of the gods, decided to join in on the fun of Baldur's invulnerability. He got the blind Hod to shoot his brother with the mistletoe, thus killing him. Baldur's wife died of a heart attack on his funeral ship (his own boat), and so was burned along with him. Anyway, the story is longer if you just search for "Baldur in Norse Mythology."