I have the following to say: The book is packed with a good amount of information about Tcl. However, the font is so small, it is a bit difficult to read it. On the other hand, bigger font means more pages and the cost; the book’s price would be higher. I wish there was a Kindle version too. The author made a huge effort in writing such a big volume focusing on just Tcl (no Tk library), and it is important in educating Tcl programming and promoting this unique language. The book deserves 5 stars without hesitation.