Steve,
The WebSphere Development Studio Client for iSeries (WDSc) is built on Eclipse. I know the initial version of it was built on Eclipse version 1.0. I'm not sure if it has been updated yet for version 2.0. So, a book on Eclipse, like the
Java Developer's Guide to Eclipse or one of the others on the market (though I'm biased), will certainly help you learn the user interface and learn how to write plugins. The Java Developer's Guide to Eclipse is based on Eclipse v2.0. Though an Eclipse book will not teach the specific iSeries tools, it will help you understand them better because you will understand the foundation.
Sherry Shavor
[ July 15, 2003: Message edited by: Sherry Shavor ]