The first is a professional Go book written by the authors of the language:
Next is a much anticipated update to the Linux Device Drivers series. For those unaware, this is the Linux equivalent to Windows Internals:
Third is Harlan Carvey's latest book, the 2nd edition of Windows Registry Forensics:
And last but not least is David Thiel's book on iOS Application security:
I expect all of these books to be of high quality and well worth your time if you are interested in the particular subject matter. I am already planning to preorder all four of them!