These are a couple of good C++ books for reference.
The first book, “C++ Primer” is a very large, very detailed book that serves as excellent reference for C++ and programming in general.
The second book, “O’Reilly – Practical C++ Programming” offers a practical approach to Object Oriented Programming with C++. This book is a .chm file, which means you open it with the Windows Help Viewer. If you’re using Linux, find a CHM viewer.