ITIL Foundation consists of a library of five books:
Service Strategy - Guidance on defining the types and levels of service that you wish to provide to your users and/or your customers.
Service Design - Guidance to shape the way in which your service strategy will become a reality.
Service Transition - Guidance on the implementation of these services. Moving from the previous state to the new state.
Service Operation - Guidance on the day to day management and measurement of your services.
Continual Service Improvement - Guidance on how to periodically reviews your portfolio of services to ensure that they are as good as they can be and still of value to your clients.
In addition, ITIL is supported by a comprehensive qualifications scheme, accredited training organizations, and implementation and assessment tools.