Zero Sum Game - S. L. Huang
Ridiculously campy fun. Combat mathematician uses her smarts - and her guns - to chase baddies throughout America. Bombs, vector calculus, and hard-boiled detectives.
Similar to The Chemical Detective by Fiona Erskine - in that it is autobiographical wish fulfilment - but much better executed.
The last few chapters are stunning - and have me eager for the sequels.