Helix by JL Bryan
Approx. 180,070 words.
Published on August 29, 2010.
In the 28th century, humans inhabit more than a thousand self-contained orbital colonies in the near reaches of the solar system.
Billions of colonists follow the religious teachings of priests who promote managed evolution and control followers' reproduction through genetic engineering.
But the priests have secret research, and the monsters they've created are breaking free.