A Linux Admin's Guide to Windows?

Rexburg asks: "I recently took a job managing an all Windows network. While my knowledge of the OS is enough to perform the functions of my job, I want to have my bases covered. Naturally, I began the hunt for documentation, but all I can find are books to help Windows users/admins understand and use Linux. I need the opposite. Can the Slashdot crowd point a fellow OSS-head in the right direction?"