The Decrypter and the Pythagoras Clause - The Calla Cress Decrypter Thriller Series, #5

Predicting the future was supposed to be a game until it became deadly serious. When a dangerous app begins predicting the future and causing users to fall into mysterious comas, secret government agent Calla Cress is thrust back into the world of secrets and lies. As she races against time to disarm the app, she is confronted by an old enemy who wields powerful technology and threatens to expose a dark part of Calla's past.
With the help of international espionage, Calla must travel from the shores of Turkey to the allure of Havana as she unravels a centuries-old mystery involving a student of Pythagoras and an alarming global government cover-up. Get ready for a wild ride of non-stop action and suspense with this thriller, perfect for fans of Steve Berry, Scott Mariani, Ernest Dempsey and Clive Cussler. What readers are saying about The Decrypter Series and Calla Cress.????? "Takes you on a ride and refuses to let you off until you reach the very end."????? "A brilliant read! I recommend this to anyone who enjoys mystery, suspense, thrillers or action novels.
The detail is astounding! The historic references, location descriptions, references to technology, cryptography....this author really knows her stuff."????? "An action-packed adventure, technothriller across several continents like a Jason Bourne or James Bond movie, but with an actual storyline!"????? "Brilliantly written. I loved the very descriptive side, which was a good way of visualizing and getting to terms with each new place, as the action takes place in several different countries."