Are these books outdated?

[Aleksander Alekseev]

> That's strange. I provided the link because of the 4nd edition of the 
> book. The online version was about the 3rd edition which handled
> Kernel 2.6.
> 
> >  
> >> [1] - https://ezs.kr.hsnr.de/TreiberBuch/  
> >  

Right, version that was published online is outdated anyway. You can
buy the 4th edition in PDF and other formats on oreilly.com:

http://shop.oreilly.com/product/9783864902888.do

Also I've just remembered that there is a free (!) and up to date book
in English "Linux Insides" by Alexander Kuleshov (Twitter - @0xAX):

https://0xax.gitbooks.io/linux-insides/content/index.html

It doesn't cover everything (debugging for instance) and is still work
in progress but it's definitely worth reading.

-- 
Best regards,
Aleksander Alekseev