This one felt slow to start, and slightly confusing at times. For example, it took me a while to figure out what was going on with the Bible flashback in the third album (which was pretty cool, by the way). But the end was worth it, especially the last album! It really started to pick up speed towards the end of the third album and didn't stop until the end! :)
Also, I thought I'd address a review I saw where the listener was confused about Zagon "releasing a 'cancer' on the world." In context, that sentence was meant figuratively, and means "He has something really bad in the works!" ;)
Lastly, I thought I'd mention the fact that there is some inaccurate history mentioned/implied throughout this series--especially in regards to the Reformation/Inquisition. It's just a few lines (and they're flashbacks from the previous series). It's probably not even the scriptwriter's fault, as there is widespread misunderstanding about these two events in our society today. I've studied both in depth and was amazed at what I found by examining primary sources!
Overall, good series! I loved the ending and would recommend this series to my friends! :)