Book excerpt: Was it murder? Was it horribly botched surgery - accidental malpractice? Was someone in the great Boston medical centre -violating the Hippocratic oath? No one knows exactly. . . Only one doctor is willing to push his way through the mysterious maze of hidden medical data and shocking secrets to learn the truth. This explosive medical thriller is vintage Michael Crichton - with the breathtaking blend of riveting suspense and authentic medical detail that has made him one of today's most fascinating writers.