Windows Internals, 5th Edition is now available, and covers Windows Vista and Windows Server 2008 (32-bit and 64-bit) and besides revisions and enhancements to existing content, adds an additional 250 pages, bringing the total page count to over 1200 (25% longer than the previous edition). Besides new experiments highlighting the Sysinternals tools, new topics covered include Hyper-V, the image loader, debugging infrastructure, Kernel Transaction Manager, Code Integrity, Thread Pools, Mandatory Integrity Controls, Windows Driver Framework, and Bitlocker, to name a few.

More info: Windows Internals book page