I run a mostly-Linux hosting company with many staff who are Linux experts. I'm looking for some good books to shorten my learning curve so I can help our customers administer their Window systems. We run thousands of Linux hosts, but only a handful of Windows ones - what are the essential titles to bring us up to speed on Windows Server 2008, Exchange 2007, Active Directory and other technology staples of the Microsoft world?
My impression is many titles are full of business planning advice over technical detail, and not a great deal on command-line / scripted operation which is more our style of system administration. Any recommendations for a slightly UNIX-slanted, hosting-slanted audience would be appreciated.