You guessed it - time for the fifth Passages book!
Draven's Defiance is the only one that was written in the first person, so it's a different experience as you're seeing everything from Scott's point of view. It's also different, as Scott is the only one to stay in Marus instead of returning to Odyssey, and he is actually a parallel to the Biblical character of Elisha. The introduction to the story is interesting - we find out that James Curtis, the Chronicler, is a patient at Hillingdale Haven. It makes Whit, Jack, and the reader pause...and wonder if Marus really is real or if it's just the imaginings of a senile man.
To me, the main theme of the book seemed to be trust in God. Both Scott and Draven had to learn that lesson, especially when Draven became afraid of Skalaw. He didn't know what the Unseen One was doing, and instead of trusting...he ran away. And Scott had to trust, even when he was told he would be staying in Marus, away from his home and parents.
Parallels:
People:
Draven = Elijah
Mobeck = Ahab
Skalaw = Jezebel
Wydrah and Cylindra = widow and her son
Ladan = Obadiah
Gwynn = Naboth
Events:
The stopping of time = the drought
Wydrah's home, garden, well, etc. being outside the stopping of time = the widow's oil and flour never running out for the length of the drought
The Unseen One through Draven bringing Cylindra back from the dead = the widow's son being brought back from the dead
Draven setting up a meeting with Mobeck through Ladan and arranging the showdown at the University of Hailsham = Elijah arranging a meeting with Ahab through Obadiah and commanding them to prepare for the showdown at Mount Carmel
The failed attempts by Mobeck's scientists and Skalaw's advisers to restart the hands of the clock, and then Draven destroying the clock first before praying to the Unseen One to restart the clock and time = the attempts by the priests of Baal etc. failing to make it rain, and then Elijah pouring water over the sacrifice before praying to God to consume the sacrifice etc.
Draven running away after Skalaw wants to kill him = Elijah running away after Jezebel wants to kill him
Mobeck getting Gwynn's property by the lies of witnesses against him = Ahab getting Naboth's vineyard because of false accusations against him
Draven showing Mobeck and Skalaw how they would die: Skalaw being eaten by vultures etc., and Mobeck pleading for mercy = Elijah telling Ahab and Jezebel their fate: Jezebel being eaten by dogs, and Ahab putting on sackcloth and ashes
Scott being told he was chosen to be the successor to Draven and going to tell his parents goodbye in a dream before returning to Marus to follow Draven = Elisha being chosen as Elijah's successor and going to say farewell to his parents and making a sacrifice before following Elijah
Anything more to add?
Thanks for laying all that out there! As I was reading, it took me a really long time to realize that Scott was basically Elisha. Close to the end, I was thinking, "But he has to go back home!" when I remembered that they said in the prologue that Scott was never found, and I realized that he really was staying and that he was a parallel of Elisha. Usually I pick up on these things faster, and I have read the book before, though my memories were quite vague.
) Marus, who sounds like Abraham to me ("A man called Marus was called by the Unseen One to establish a nation of true believers...he doubted the unseen one and did the opposite of what he'd been told to do when moving into the land" - page 85). Fendar is referred to, but he's book 6, so he's covered. 
Thanks.
I think that Fletcher is mentioned in that list, but I was only listing those that we don't know about from other books/episodes.