A member of the community provided me this material and IBM have given permission to republish it.
It is basically a CD-ROM that includes an INF file that has:
- Getting Started
- About WARP Server
- About WARP Server Certificacion
- WARP Server Self-Study Guide
- Warp Server Qualification Test
- IBM Classroom Courses
- Credits
It is a long book that I hope you enjoy.
https://www.os2world.com/wiki/index.php/OS/2_Warp_Server_Study_Guide