The ITIL Service Transition stage of the ITIL v3 framework offers guidance for IT professionals wishing to introduce new and changed services, ensuring that the value identified in the service strategy is maintained and controlling risks to smooth operations. The guidance describes best practices for managing service change, and helping departments and businesses to transition efficiently, from one state to another. The effect of change on operations, customers, users and the business are all considered in this critical stage of the ITIL lifecycle suite.
Although this is part of what used to be called the IT Infrastructure Library this is a very useful primer on service transition and the management of organisational change that could be used widely outside IT services.
it was good but a bit complicated, you need to read some handy book from different Author first or be familiar with service transition then jump in this book, otherwise you may get confuse.