First- change the title, or switch it around. This is what I intend to do. For example- Prelude...
The cover will read Prelude- A Zodiac Chronicle.
I am also going to skirt away from using the signs as the title of a book. I wouldn't want my works confused for the other people who chose titles like "The Zodiac Chronicles: Cancer"
I'm also thinking about pairing up characters. Instead of giving each one an individual novel, I'll team two heroes to a book. As it's written, Taurus and Libra are prominent in Prelude. I see no reason why I shouldn't or couldn't continue this trend with the others.