I've started writing a Nintex Workflow Book for Russian Speaking readers. For now book divided into 3 parts to get first result in consequence manner without long run in total. Several draft chapters are ready for first review. You can find first chapters and book updates info on http://sharepoint.mentoors.com/?cat=141
You are very wellcome to participate in any form to support this project.
Separate site for book come soon after some issues will be agreed with Nintex legal and marketing team.