This is interesting, apparently after the release of Handmade Electronic Music, Nick Collins co-wrote another book with Andres Bosshared, Bruno Spoerri, and Norbert Möslang called Home Made Sound Electronics. Unfortunately it looks like its only available in Switzerland. The content very much intrigues me, especially this solar powered point to point circuit pictured below. Not much of a description on the page, aside the fact that most of the projects are DIY music related.

[publisher site]
[blog entry at GetLoFi]