Good - engaging, pacy plot, plausible scientific detail and interesting characters. Audiobook narration largely very good.

Bad - False, jokey modesty of the hero who is clearly a genius. Too much geeky indulgence in explanations of the science. Felt like a textbook sometimes. Note for the narrator, whose German pronunciation was occasionally off the mark: it's "ge-fair-lich", not "ge-FAR -lich". And the Germans I know don't say "und"; they say "and", pronounced "end"!

Not disappointed by the lack of aliens.