This week's book giveaways are in the iOS and Features new in Java 8 forums. We're giving away four copies each of Barcodes with iOS: Bringing together the digital and physical worlds and Core Java for the Impatient and have the authors on-line! See this thread and this one for details.
You cannot run the JAR file because it wasn't created to do so. I suspect that it contains many separate examples and is not meant to be run as a single program. To run the individual examples, you can use
jar xvf codeKitchens.jar
to extract them first. Then you probably need to compile and run each one separately.