I guess that the title says it all.
I know PHP and am just beginning with MySql (but plan to use ODBC). I don't need any books explaining that.
I am probably qualified to develop a simple web site, but aim at taking on quite ambitious apps. I imagine that almost all web apps have some commonality like security, scalability, etc (I have absolutely no idea how to distribute a data base or an app over server servers, for instance).
I am sure that there are a whole bunch more; is there a good book to explain these, maybe even with coding examples, but at least explain the concepts, if not?