All Make Jumpstart books provide a quick way for readers to "jumpstart" their knowledge of a certain topic.In 50 intense pages, Jumpstarting JavaScript shows makers how to install the Node.js environment on a Raspberry Pi, how to use Node.js to turn their Raspberry Pi into a self-contained web server, and how to get that web server to send a tweet.
Short but to the point. Unfortunately, I don't think this book had enough practical samples to make it a worthwhile guide to actually learning javascript. It's a good primer if someone is curious what javascript is, and how it can be used, but I'd not recommend it to anyone for actually learning the language. Add to that, the primary example is a twitter bot that will no longer be valid once twitter changes their interfaces in August of this year, and this book looses it's utility almost entirely after that point. Still, if you're trying to find out what all the hype is about, this book will serve as a good jumping off point for further study.