As President of the International Informix Users Group (www.iiug.org)... Thank you to all the authors. I have not had a chance yet to read the book, but Thank you for the time spent doing this Redbook!
I like a lot of this redbook, and use it for search about the compatibility to migrate from oracle and alternative solutions for specific functionalities.
I missing one subject, Materialized Views... the best way to create a similar functionality on Informix.