TypeScript in 50 Lessons

You might have heard about TypeScript, but you might not know why it's useful, and how to make it work for you. This book is supposed to fix just that: it provides JavaScript developers with a simple, structured and pragmatic guidance towards TypeScript, and explains how to make sense of it all, step-by-step.
In “TypeScript in 50 Lessons”, Stefan Baumgartner breaks down the quirks of TypeScript into short, manageable lessons — for front-end developers who know enough JavaScript to be dangerous.