[Link] APIs for Dummies - Get the book

APIs are like the neural system that powers the digital world of today. Without APIs, there would no mobile apps that seamlessly enable you to search, browse, discover or transact on the go.

While the technology for this has been around for a while, it is only recently, that APIs have gained more prominence. Fret not - if you are somewhat a newbie here, here's just the resource for you:

Get the free book: APIs for Dummies, by IBM.