Salmonellae are important pathogens, responsible for an estimated one million deaths and 100 million human infections annually. Their genomes are mosaic puzzles, results of lateral transfer events that occur within a stable genetic background. Extraordinary diversity of host ranges and pathogenicity traits between different strains are the consequence of both specific genome insertions/deletions and minute changes in genome composition. Genomic information decoded from a multitude of different Salmonella strains and new dramatic insights into pathogenic processes emphasize the fact that Salmonella research is currently at a very exciting juncture. In addition to their fascinating resilience in both the environment and eukaryotic hosts, Salmonella prefer tumors over any other location within the human host (by a factor of 1000 or more). This ability could propel Salmonella into future use as a therapeutic delivery agent to control and/or cure cancers. In this book, internationally accla