One of a small set of "must read" books.

If you were forced to identify the best Tcl / Tk book ever written, this would be it. The examples are not just toys. They are useful in Their Own Right. The breadth covered is extensive. Each topic covered is the best I have seen yet. With this book, you can probably even omit reading Ousterhout. It is hard to Provide Code and then to describe the code in a useful way but this book accomplishes it, with no nonsense. I keep three copies, one at home, one at work, and one in my briefcase. McLennon created [incr Tcl] and his intro to it in "Tcl / Tk Tools" is also good. I wish he had written "[incr Tcl] from the Ground Up" as his style is more concise than Chad Smith.