Amazon GuardDuty: Amazon GuardDuty User Guide
This is official Amazon Web Services (AWS) documentation for Amazon GuardDuty. This user guide provides a conceptual overview of GuardDuty, a web service that enables AWS customers to continuously monitor the security of your AWS environment. The guide describes how setup GuardDuty and how to integrate GuardDuty with other AWS services. The guide also provides instructions on using the various GuardDuty features with the AWS Management Console (an easy-to-use graphical interface), the command line interface (CLI), or the GuardDuty API. This documentation is offered for free here as a Kindle book, or you can read it online or in PDF format at http://aws.amazon.com/documentation/guardduty/.