"Clayton Stumper might be in his twenties, but he dresses like your grandpa and fusses like your aunt. Abandoned at birth on the steps of the Fellowship of Puzzlemakers, he was raised by a group of eccentric enigmatologists and now finds himself among the last survivors of a fading institution. When the esteemed crossword compiler and main maternal presence in Clayton's life, Pippa Allsbrook, passes away, she bestows her final puzzle on him: a promise...

"Near the end of the Cold War, a CIA code breaker discovers a symbol she recognizes from her childhood, which launches her across the world to the heart of Berlin just before the wall comes tumbling down"--

During the Prohibition Rum Wars, which created a booming smuggling economy, two women masterminds--Elizebeth Friedman, the inventor of cryptanalysis working for the government, and Marie Waite (aka Spanish Marie), on the rise to rumrunner royalty to save her family--will go to any lengths to rule the Gulf Coast. "1926, Washington, D. C. In the Prohibition Rum Wars, the Coast Guard is losing. Eleven million gallons of illegal liquor a year have created...

Charlie Thorne, along with former agents Dante Garcia and Milana Moon, race to find an immensely powerful discovery of Isaac Newton's and face challenges and enemies along the way. Charlie Thorne is a genius. Charlie Thorne is fearless. Charlie Thorne may have finally met her match. Charlie Thorne is used to being on the run. Ever since she was recruited by the CIA to track down Einstein's most dangerous equation, Charlie - and former CIA agents...