Those very kind people at Microsoft have let us have a free e-book about Microsoft SQL Server 2014.  Well, you have to pay for your own internet access, but don’t be tight!

It can be downloaded in PDF, EPUB or Mobi for Kindle formats.

http://www.microsoftvirtualacademy.com/ebooks

Also, they have some other free e-books as well, in the following categories.  Needless to say, choose the SQL Server option at the bottom to get the really important one.