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I have opened so many drive links here and on facebook and now i have a huge collection of books. But also of CSS books and things. Just opened the drive and it is tens of books and resources. 
This one has all the CSS related books. I haven't gone over the link so can't say how relevant this would be. But sharing it if it helps someone.
https://drive.google.com/folderview?id=1_qzujGrNOyUObPXwgqBzGBlioTafEuc3
https://drive.google.com/folderview?id=1_qzujGrNOyUObPXwgqBzGBlioTafEuc3
There is more data than I imagined. 
https://drive.google.com/folderview?id=0B6v4e-Z4IUM-NUpqdnp1QTdoejA
https://drive.google.com/folderview?id=0B6v4e-Z4IUM-NUpqdnp1QTdoejA
If you're someone who is taking competitive exam, please feel free to use any of these drive links. I am not sure how this is on my drive but some of it is great stuff. There are good books in it surprisingly!
