Axis and Vortex are interesting stories, but very different from the first one. They become maybe a little bit less interesting with each iteration, but are sti

Axis and Vortex are interesting stories, but very different from the first one. They become maybe a little bit less interesting with each iteration, but are still entertaining. The first book is full of mystery and the personal dynamics of a few people over a large section of their lives and none of the other books are like that, although some amount of mystery is a piece of each. I definitely didn't regret reading Vortex or Axis.