Incorporate HTTP into the title

[tlhunter]

http://www.reddit.com/r/programming/comments/2d8w1o/creative_commons_book_on_api_design/cjn7aeh

The title is ambiguous and sounds like generalized API design, while this book is specifically about HTTP API design.

[tlhunter]

"Consumer-Centric HTTP API Design" perhaps?

It doesn't quite roll off the tongue as much as the current title "Consumer-Centric API Design", though it's a bit shorter than the first title: "A Consumer-Centric Approach to RESTful API Design" ;)