I can't say enough good things about this series. Each book is distinct and different, yet the threads between them are strong enough to weave a greater narrative. Takeshi is the ultimate anti-hero who answers only to himself—even if his employers think otherwise. Every book is filled with far-future tech embedded in societies that makes sense in the context. That is, there is both cool Sci-Fi tech and believable impacts on humankind from it.
It's hard to pick a favorite of this series. After I re-read each one, I decided that one was my favorite. Until I picked up the next one again.
