What level are these aimed at? The fundamentals book doesn't look like it covers many of the new Java 8 features, just lays the groundwork for the Language Features book.
The title "Beginning Java 8" is a 3-book series that contains all Java 8 new features. The series is aimed at beginners to intermediate-level developers interested in learning the Java programming language from scratch or interested in picking up just any core Java topics. A chapter-wise breakup of Java 8 features are as follows:
