I think there are still no DX11 tutorials / books. If you want to study DirectX in-depth, you could grab some DX10 book and also examine DX11 SDK and MSDN.
There is nothing really new in DirectX 11 (in application architecture / code building principles), so you could examine new API features and (if you're actually proficient with DirectX), getting used to them should not be very hard.
In this case you simply won't need any tutorials.
If you need some actual code samples, this (and other DX11
searches) could probably help you.