Fatal Dose: A Cliff Knowles Mystery

X-rays can kill cancer cells and save lives when administered properly. They can also kill people when things go wrong - a fact learned the hard way by retired FBI agent Cliff Knowles. Hired to unravel the cause of some mysterious overdoses, he gets too close to the truth and finds his own life on the line. Inspired by actual cases he worked as an FBI agent in Silicon Valley, the author weaves an absorbing tale of greed, technology, and terrorism in this high-tech legal thriller. After reading Fatal Dose you'll never look at an X-ray machine the same way. Fatal Dose follows geocaching FBI agent Cliff Knowles in the third riveting installment of the popular Cliff Knowles Mysteries series.

Russell Atkinson served as an FBI Special Agent for 25 years, where he specialized in high-technology crimes in Silicon Valley. He was the first to investigate Raj Rajaratnam, the billionaire hedge fund manager who was convicted of insider trading in 2011. He was the case agent on the first federal prosecution in California under the Economic Espionage Act. He worked on the Polly Klaas kidnapping case and has arrested murderers and drug dealers. After retiring from the FBI he practiced law. With degrees in mathematics and law he worked for many high-tech firms in the computer industry including IBM, Fairchild Semiconductor, and Netscape. He served as President of the American Cryptogram Association and has written extensively on cryptographic topics. He was Head Cryptographer for the movie The Red Machine, which was given a thumbs up by Roger Ebert. Now retired, he lives in Silicon Valley and spends time with his interests: running, geocaching, guitar, cryptography, and, of course, writing.