Thank you Romans for the question.
The other primary Java 8 coverage from Java 8 is the new Date and Time API which is in chapter 18.
In my blog post here, I detail the various minor updates to the book for Java 8 from Java 7:
http://robertjliguori.blogspot.com/2014/02/java-8-pocket-guide-its-new.html
This blog post listing right now is a little obtuse. Later tonight, I will try to make the references more specific.
Thanks again for the question,
-- Robert