This Wiki is a very rich resource. Browsing is nice, but I kinda wish that the gems here were available in printed format. Not exactly a cookbook, but an edited best of Wiki (games, toys, techniques, hacks, etc).
-- Todd Coram
RS: This topic has been discussed several time in the Tcl chatroom. The biggest problem seems to be the very different views on copyright by publishers and by us. A publisher would require to receive the rights to the text of the book, and might even sue people who reuse contents of this Wiki. (I think it happended to Wolfram's MathWorld). So for the time being, even if we found a willing publisher, chances are very little...