https://www.manning.com/books/java-persistence-with-hibernate-second-edition
Java Persistence with Hibernate, Second Edition explores Hibernate by developing an application that ties together hundreds of individual examples. In this revised edition, authors Christian Bauer, Gavin King, and Gary Gregory cover Hibernate 5 in detail with the Java Persistence 2.1 standard (JSR 338). All examples have been updated for the latest Hibernate and Java EE specification versions.
http://jpwh.org/examples/jpwh2/jpwh-2e-examples-20151103/
https://www.manning.com/books/akka-in-action
Akka in Action is a comprehensive tutorial on building message-oriented systems using Akka. The book takes a hands-on approach, where each new concept is followed by an example that shows you how it works, how to implement the code, and how to (unit) test it.
https://www.manning.com/downloads/478