I don't know if I'd call a book with 61 chapters "concise".
They aren't book-length chapters. E.g. https://gibbok.github.io/typescript-book/book/strictnullchec... is one paragraph, https://gibbok.github.io/typescript-book/book/void-type/ is 1 sentence plus 1 3-line example. Near all of those "chapters" seem to be bit more than that. 1~2 paragraphs plus 1~2 code examples.
It didn't included the JavaScript subset, so that's pretty concise.
They aren't book-length chapters. E.g. https://gibbok.github.io/typescript-book/book/strictnullchec... is one paragraph, https://gibbok.github.io/typescript-book/book/void-type/ is 1 sentence plus 1 3-line example. Near all of those "chapters" seem to be bit more than that. 1~2 paragraphs plus 1~2 code examples.