http://www.amazon.com/exec/obidos/tg/detail/-/0130385603/qid=1046168352/sr=8-1/ref=sr_8_1/104-7014893-7300739?v=glance :
Authors: Brent Welch, Jeff Hobbs, Ken Jones
As of March 2003, anticipated availability is June 2003.
This book will be up-to-date with Tcl/Tk 8.4. The book's home page is http://www.beedub.com/book/