Digital Fortress is the name of a code that threatens to destroy the world's most advanced computer, located inside the supersecret National Security Agency. Susan Fletcher, a brilliant mathematician, is called in to find out how someone managed to inject a virus into the computer. At the same time, her lover is sent to Spain to retrieve a ring that contains the solution to the virus problem. The story shifts from Spain to Washington, and the suspense is maintained even in some of the technical sections. Paul Michael adroitly leads the listener on a roller coaster ride of murder, deception, and treason. Though people will check this out based on the success of Brown's The DaVinci Code, it stands on its own as a contemporary technothriller of the highest order. Recommended for all libraries.-Joseph L. Carlson, Allan Hancock Coll., Lompoc, CA Copyright 2005 Reed Business Information.