You should become familiar with the following basic documentation:
Solaris 8 Introduction
Solaris User's Guide
Asian Solaris 8 (SPARC Platform Edition) Release Notes
Asian Solaris 8 (Intel Platform Edition) Release Notes
Advanced users may want to read Solaris Advanced User's Guide. Advanced users who want to customize their system environment or the operations of their Sun tools will find pertinent information in International Language Environments Guide and Simplified Chinese Solaris System Administrator's Guide. These books contain information on setting up, administering, programming, and customizing product features for advanced users, developers/programmers, and system administrators.