You may remember Seth Margolis' book and the subsequent movie, Losing Isaiah, and he has since published many more novels. In The Semper Sonnet he takes the reader on a wild ride with both a present day and also historical mystery. When Lee Nicholson finds an unpublished sonnet which she believes to have been written by William Shakespeare, she unwittingly becomes a target. After reading part of the sonnet with its hidden meanings on a television show, her life and those around her become endangered. But it isn't just about the sonnet, she uncovers intrigue in the court of Elizabeth I and also a virus that has been entombed for centuries and could be unleashed at any time.