The book does not cover Hibernate Core per se but Hibernate Search which provides full-text search for Hibernate Core and Hibernate applications.
Within that, Hibernate Search provides abstractions for both Hibernate Core APIs and
Java Persistence API (you have a FullTextSession and a FullTextEntityManager. Both are described in the book.
Also, I describe how to cluster Hibernate Search in a async mode using JMS and and MDB ie within Java EE 5.
Hope that helps.