Understanding and Deploying LDAP Directory Services (2nd Edition) by Timothy A. Howes
While early directory standards (such as X.500) offer some cross-platform functionality, none has the flexibility and widespread appeal of Lightweight Directory Access Protocol (LDAP), which is fast becoming a standard part of networked computers
In Understanding and Deploying LDAP Directory Services, three experienced engineers share their knowledge of LDAP in theory and practice, effectively defining this fast-emerging technology. If you're planning to work with LDAP in any way--whether as a network manager, a software developer, or an information technology administrator--you need to read and pay attention to this book. It's the last word on LDAP as it stands today. Since directory services aren't widely understood, this book begins by defining them and explaining what they can do for an organization. The guide then gets into the specifics of how LDAP organizes directories and handles queries. The authors go to great lengths to talk about what information to put in directories, how to validate and maintain it, and how to manage access to it. There's also lots of material on initiating LDAP services and on troubleshooting.