Has anyone heard of the programming language TCL? My manager has just asked me to learn this language and I can't find anyone who knows anything about it. I tried looking at text books online, but every one I look at has about a 50/50 customer rating (and the half that don't like it say that it is inaccurate in it's teaching). I've had several people tell me to just get those books, but I don't want to learn something that isn't correct. Do you have any recommendations?