Luis,
For what it's worth - as a decade plus user of TiddlyWiki, your book has provided me the equivalent of *years* of monitoring these google groups for how-to knowledge.Huge thanks and kudos to you.
I am one of those people who only likes to implement other people's plugins once I understand every line of code (so I can keep maintaining it if the original author moves on). Your book has given me so much info! Especially the stylesheet and other customization sections. I've been working on a left-menu thing on/off for years, and your text gave me a few of the missing pieces.
I too have seen some language things that need fixing, and some of the examples are not copy-paste-able (extra spaces coming through), so interested in what the end product will look like. Would a TW version on TiddlySpot or something else even make sense?
Happy to help in any way I can.