If you are looking for good online books on C++ look no further here is a great sources of C++ Books which not only help you to master the basic as well make a good programming out of you, no matter which level of programmer you may be it do not matter.
Top Best books on C++
Thankfully the new edition just arrived last year so there not much you would find online, all the ebooks would hit online is all headed back to 2005 to 2007 some are upto 2012 but not much if you read them. If you are looking really for the good asset do a hand reference you may conclude some of the links that leads to some resources for ebook as well list of good ebook on amazon and mixture of both. I have tried them used them and know their importance its your turn to check it out.
Ist of all I would ask you go and check some of the 2 or 3 three library which do have some goodies around the subject to make it easier on you I have included 3 lIbrary which I have so far found usefull.