Microsoft Press. Windows 2000 Active Directory Services . Redmond, WA: Microsoft Corporation, 2000 (ISBN 0735609993). Some sections in this book provide general information about trees, domains, and trust relationships.
The Microsoft Windows 2000 Server Resource Kit contains in-depth information about designing Active Directory domains.
Try searching the TechNet CD, or use Microsoft's online version at www.microsoft.com.
Microsoft Press. 
Try searching the TechNet CD, or use Microsoft's online version at www.microsoft.com. 