Informix Redbooks
The IBM provides in loose order the legendary RedBooks about interesting topics. They can be downloaded free of charge as PDF-documents on the IBM Website.
Here you can find a small selection of interesting Redbooks about Informix related topics.
Actual suggestion:
Query Acceleration for Business using Informix Warehouse Accelerator (2013-10)
Informix:
IBM Informix Developer's Handbook
Informix Dynamic Server 11: Advanced Functionality for Modern Business
Data Warehousing with the Informix Dynamic Server
Customizing the Informix Dynamic Server for Your Environment
Informix Dynamic Server 11: Extending Availability and Replication
Using Informix Dynamic Server with WebSphere
Migrating from Oracle . . . to IBM Informix Dynamic Server on Linux, Unix, and Windows
Migrating from Microsoft SQL Server to IBM Informix
Embedding Informix Dynamic Server: An Introduction
IBM Informix Flexible Grid: Extending Data Availability
Solving Business Problems with Informix TimeSeries
Query Acceleration for Business using Informix Warehouse Accelerator
