Windows NT Microsoft Cluster Server
Written by Richard R. Lee.  Published by Osborne McGraw-Hill
The author declares that this book is the best, that it provides all details of installation and troubleshooting.  I liked the introduction to clustering.  The installation had some errors that made me look more at white papers than the book.  On the other hand, the troubleshooting portion was excellent.  I suggest finding install documentation elsewhere but if you need a troubleshooting guide, this one will work.

Windows 2000 Cluster Server Guidebook
Written by David Libertone.  Published by Prentice Hall.
This book should be very popular. Windows 2000, Clustering, SQL, Exchange - are very hot in NT (2000) administrators world. This book covers not just clustering but details on specifics related to MS SQL, and MS Exchange clustering.  Clustering is a good technology to learn to set yourself apart from all of the other administrators out there.