Yes, and also the Pegasus series. Pegasus describes the development and slow acceptance of Talent by the majority on Earth, TTATH describes how humanity colonizes our galaxy with the help of Talent. That's putting it simply, but that's the gist of it.
You may be tempted to look at my partial (2 missing books) character index:
Towerdex
Beware of spoilers if you do check it out.
