Root of Unity

Root of Unity was the third book in the self-published Russell's Attic series, but is now awaiting paperback republishing with Tor. It introduces Professor Sonya Halliday, DJ, the Lancer, Rita Martinez, and some delightful federal agents. Cas is brought face-to-face with some truths about her past that she never realized while working on math that can crash global economies or even destroy all civilization as we know it--All while dodging or possibly working with a black-hat hacker, an overly-enthusiastic explosives maniac, the feds, and her own concepts of friendship and decency.