And what about the "TypeScript Design Patterns" book, you guys have read it ? Is it good ? Is it worth the investment ? http://amzn.to/2ym40AW http://amzn.to/2y

And what about the "TypeScript Design Patterns" book, you guys have read it ? Is it good ? Is it worth the investment ? http://amzn.to/2ym40AW http://amzn.to/2ym40AW And what about Online Courses on Udemy?