I'd suggest going through that book a few times, step by step. Then progress to more advanced topics and examples. As with anything, practice, practice practice is the only way.
Edit: there's thousands of sites all over the internet.
The best thing to know, is how to narrow down your searches with Google.
Try searching using these strings.
filetypedf "learning C++"
Instead of left clicking on the resulting pdf's.
Right click them and select "Save link as" then save to some location on your hard drive.
You'll find everything you need.
Teaching to fish