Just published online by WIEGO:

 The Only School We Have: Learning from Organizing Experiences Across the Informal Economy

Compiled and edited by Christine Bonner and Dave Spooner.

This handbook is a resource for those organizing informal workers in any sector, though it is based on the organizing experiences in (mainly) four groups: domestic workers, home-based workers, street/market vendors and waste pickers. It draws on the themes, ideas and information generated at a WIEGO Organizing Workshop, together with additional background materials, case studies and analysis.

http://www.inclusivecities.org/wp-content/uploads/2012/07/Bonner-Spooner_The_Only_School_We_Have.pdf