Just finished the Icarus Needle. A sci fi adventure story. the 5th book in the series. Sixth if you count the Icarus Hunt which is the introduction to the saga.
Its by Timothy Zahn who is most famous for his Star War novels that I have not read. but I like his Quadrail series, sci fi mysyteries , And his Cobra books which are military stuff. Sci fi mysteries are sort of rare. And the Quadrail series if a homage to Noir detectives, Hitchcock, and any murder mystery on a train.
Anyway, the end of the Icarus Needle leaves it open for at least another book in the series. or maybe more. I'm kind of hoping that he wraps this up. I'm getting tired of them.