Counterattack — Michael Townsend

It's the 25th century, and the human race has begun to establish colonies outside the solar system. The first was established on Destiny, amid an alien culture of primitive but paranormally skilled human-like natives (Book 1). The Earth colony must deal with a rogue native wizard who attacks the colony by kidnapping its children. A second alien race threatens to enslave Earth people, kidnapping a senior officer. The officer is rescued, and a counterattack on the alien spaceport is launched. A third alien race helps defend Earth colony ships from attack; but it turns out they are vectors for a religious virus that threatens to take over the Earth and Destiny.