Tachyon - Die Waffe

Just like many other SciFi stories, it had me wondering at times about the science. Most of them try to sell it as quite likely (and not some basically fantastical mumbo-jumbo) and this was no different.
The timeline of the story arch was complicated as it was to be expected. I only realised now that it's supposed to be a series of books and otherwise I would have felt that the ending was not satisfying.