An appropriately opinionated exploration of JavaScript. The exhaustive diagraming of the language syntax and common methods can be skipped by those who have used the language before. The observations in the chapters on Functions (4), Inheritance (5), Style (9), and lists of gotchas in appendices Awful Parts (A) and Bad Parts (B) make this a must read for anyone developing with JavaScript. The author has a very strong point of view that is presented throughout the book, but I found warranted given the number of ways on can unintentionally harm yourself in JavaScript.