In book four of the series, Darrnen and Mr. Crepsley face the dangerous path to head to Vampire Mountain. The path is tough and along the way they find some disturbing things. They make it to Vampire Mountain just fine, but now they have to face the Vampire Princes and Darren isn't sure what to expect at all.I think these books just keep getting better and better. I seriously love them. However, I was a bit disappointed that Evra and Darren aren't as close in this book. Evra has been a favorite character of mine the past few books so it was sad to see that he wasn't in this book hardly at all and that he and Darren aren't the best friends they used to be.But I greatly enjoyed the book. I liked getting to know more about the Little People, especially the one Darren calls Left. And of course learning more about the vampires was neat as well. Can't wait to read book number 5!