Author: Eric Foster-Johnson
WWW book information: http://www.pconline.com/%7Eerc/tclbook.htm
The second edition of this book focuses on creating and debugging cross-platform graphical applications using Tcl/Tk 8.0. Windows and Unix development is covered. The book comes with a CD-ROM containing Tcl/Tk sources, a Windows binary release with install program, source code examples from the book and other Tcl freeware.
This book seems to be highly recommended by those who have used it to learn Tcl - particularly on Windows.