Meanwhile, Martin deciphered the first part of the book, thus finding out the first item needed to open a portal to Mankar Camoran's Paradise. You need a daedric artifact. On Martin's desk there is a book "Modern Heretics". Read it to know the location of Shrine of Azura.
Talk to Mels Maryon. Raise his disposition in order to make him talk. He'll tell you that you need some Glow Dust in order to summon Azura. That substance is left by dead creatures known as Will-o-the-Wisps. Those "sparks" can be found a little bit to the north. Wait until 6 a.m. and then present the gift to Azura. She'll tell you to go to Gutted Mine.
You'll have to deal with 4 vampires here. They can be a problem, so watch out. There's a lot of silver around the mine, take time to get some if you need cash badly. When you return to Azura, you'll receive an artifact. Take it back to Martin.
HINT: The Azura mission is one of 15 daedric quests. All of them are basically about finding a shrine, making an offering, and performing some kind of dungeon-like task. You'll get an artifact for each of them - and daedric artifacts are some of the best items out there. You can perform any one of them in this part of the story. You'll find details on all 15 quests in the full version of the guide.