1. Skepticism on book's conciseness due to length
SilverSlash doubts the "concise" label: "I don't know if I'd call a book with 61 chapters 'concise'".
2. Defense of conciseness via omissions
locknitpicker counters by noting exclusions: "It didn't included the JavaScript subset, so that's pretty concise".
3. Interest in official TypeScript docs
locknitpicker seeks community views: "I was wondering what is the community's opinion on the official TypeScript Handbook".