I'm looking for any general information and books that will guide beginners on the subject of mobile development. For example, I primarily develop in web standards, PHP, JS and use a couple CMSs. Making the move to Objective-C is a jump although I'm familiar with basic concepts regarded classes and such.

Additionally, I'm not sure if I fully understand how or if mobile apps can be developed in HTML/CSS/JS. I'm out of the loop. My original impression was that apps for the iPhone and Android were clearly separate from the other languages I mentioned. I assumed that if you're doing something in HTML/CSS/JS then you simply call it a website and put it online.

Can someone explain this to me and recommend any beginner books on the topic of Objective-C and iPhone development? Thanks in advance.